Answer:
X would be the unit of measure (weight) and Y would be the ammount. In a equation that would be, 2x = y.
Answer:
The values of both x and y will be greater than or equal to zero.
Step-by-step explanation:
We are given that
Cost of 1 pound of peaches=$2
If x represents the number of pounds of peaches bought.
Total cost of the peaches represented by y.
We have to find the the values of x and y which describes the best.
To find the total cost of peaches we will multiply the cost of one pound with total number of pounds of peaches.
If cost of 1 pound of peaches=$2
Cost of x pounds of peaches=[tex]2\times x=2x[/tex]
Therefore, the total cost of x pounds of peaches, [tex]y=2x[/tex]
Weight of a thing is always greater than 0 or equal to .
The total cost of a thing is always greater than or equal to zero.
Therefore,the values of both x and y will be greater than or equal to zero.
Parametric Equations? How do you do them? I don't even know how to graph them and its so confusing because all the equations I put in say they're not written correctly???
Answer:
A rectangular equation, or an equation in rectangular form is an equation composed of variables like x and y which can be graphed on a regular Cartesian plane.
Parametric equations are a set of equations that express a set of quantities as explicit functions of a number of independent variables, known as "parameters." For example, while the equation of a circle in Cartesian coordinates can be given by r^2=x^2+y^2, one set of parametric equations for the circle are given by
x=r cost
y=r sin
Note that parametric representations are generally nonunique, so the same quantities may be expressed by a number of different parameterizations. A single parameter is usually represented with the parameter t, while the symbols u and v are commonly used for parametric equations in two parameters.Parametric equations provide a convenient way to represent curves and surfaces, as implemented, for example, in the Wolfram Language commands ParametricPlot[{x, y}, {t, t1, t2}] and ParametricPlot3D[{x, y, z}, {u, u1, u2}, {v, v1, v2}]. Unsurprisingly, curves and surfaces obtained by way of parametric equation representations are known as parametric curves and parametric surfaces, respectively.
Also if you dont know how to graph them you can Use DESMOS graphing calculator
if WXYZ is a square, which statements must be true? plz help <3
Answer with step-by-step explanation:
A. WX is perpendicular to XY - TRUE:
(since X is adjacent to X and Y and all angles are 90 degrees in a square, therefore WX is perpendicular to XY)
B. ∠W is congruent to ∠X - TRUE:
(all angles in a square are equal to each other)
C. ∠W is supplementary to ∠X - TRUE:
(∠W and ∠X both are right angles which add up to 180 degrees so they are supplementary angles)
D. WXYZ is a rhombus - TRUE:
(a rhombus has all sides equal in length and so has a square so it is a rhombus)
E. WXYZ is a trapezoid - FALSE:
(a trapezoid has only one pair of parallel sides while a square has two pairs of parallel sides)
F. WX is parallel to YZ - TRUE:
(WX and YZ are parallel to each other)
Solve for the following system of equations.
-7x+6y=9
-2x-5y+16
x=?
y=?
Answer:
x = -3 and y = -2
Step-by-step explanation:
It is given that,
-7x + 6y = 9 ----(1)
-2x - 5y = 16 -------(2)
To find the solution of given equations
eq(1) * 2 ⇒
-14x + 12y = 18 ------(3)
eq(2) * 7 ⇒
-14x - 35y = 112 ---(4)
eq (3) - eq(4) ⇒
-14x + 12y = 18 ------(3)
-14x - 35y = 112 ---(4)
0 4y = -94
y = 94/(-47) = -2
Substitute the value of y in eq (2)
-2x - 5y = 16 -------(2)
-2x - 5*-2 = 16
-2x +10 = 16
-2x = 6
x = 6/-2 = -3
Therefore x = -3 and y = -2
Answer:
[tex]x=-3\\\\y=-2[/tex]
Step-by-step explanation:
Given the system of equations [tex]\left \{ {{-7x+6y=9} \atop {-2x-5y=16}} \right.[/tex], you can use the Elimination Method to solve it.
You can multiply the first equation by -2 and the second equation by 7, then add both equations and solve for the variable "y":
[tex]\left \{ {{14x-12y=-18} \atop {-14x-35y=112}} \right.\\...........................\\-47y=94\\\\y=\frac{94}{-47}\\\\y=-2[/tex]
Substitute the value of "y" into any original equations and solve for the variable "x". Then:
[tex]-7x+6y=9\\\\-7x+6(-2)=9\\\\-7x-12=9\\\\-7x=9+12\\\\x=\frac{21}{-7}\\\\x=-3[/tex]
5500 dollars is placed in an account with an annual interest rate of 6.5%. To the nearest tenth of a year, how long will it take for the account value to reach 19700 dollars?
Answer:
t = 20.3 years
Step-by-step explanation:
I am assuming that this amount of money invested is compounding annually, so I am going to use the formula that goes along with that assumption:
[tex]A(t)=P(1+r)^t[/tex]
where A(t) is the amount at the end of compounding, P is the initial investment, r is the interest rate in decimal form, and t is the time in years. We are solving for t. Right now it is the exponent, but we have to get it down from that position in order to solve for it. The only way we can do that is to eventually take the natural log of both sides. But let's write the equation first and then do some simplifying to make things a bit easier mathematically:
[tex]19,700=5,500(1+.065)^t[/tex] and
[tex]19,700=5,500(1.065)^t[/tex]
We will divide both sides by 5,500:
[tex]3.58181818=(1.065)^t[/tex]
Taking the natural log of both sides gives us:
[tex]ln(3.58181818)=ln(1.065)^t[/tex]
The power rule for logs (both common and natural) tells us that once we take the log or ln of a base, the exponent comes down out front:
ln(3.58181818) = t ln(1.065)
Now we can divide both sides by ln(1.065) and do the math on our calculators to find that
t = 20.2600 or, to the tenth of a year,
t = 20.3 years
It will take for $5500 to grow to $19700 at a 6.5% interest rate, approximately 19.7 years for the account to reach.
The question involves calculating the amount of time it takes for an investment to grow to a certain value given a fixed annual interest rate. This is a common problem in personal finance and uses the concept of compound interest. To find the time needed for an initial investment of $5500 to grow to $19700 at an annual interest rate of 6.5%, we can use the formula for compound interest:
A = P(1 + r/n)^(nt)
Where:
A is the amount of money accumulated after n years, including interest.
P is the principal amount (the initial amount of money).
r is the annual interest rate (decimal).
n is the number of times that interest is compounded per year.
t is the time in years.
In this case, interest is compounded annually so n = 1. We rearrange the formula to solve for t:
t = log(A/P) / (n*log(1 + r/n))
Where log is the logarithm function. We substitute our known values:
t = log(19700/5500) / (1*log(1 + 0.065/1))
Calculating this gives:
t ≈ log(3.5818) / log(1.065)
t ≈ 19.7
Kendra's water bottle contains 2 quarts of water. She wants to add drink mix to it, but the directions for the drink mix give the amount of water in fluid ounces. How many fluid ounces are in her bottle?
Answer: 64 fluid ounces
Step-by-step explanation:
See paper attached. (:
Use the linear combination method to solve the system of equations. Explain each step of your solution.
-4x + 9y = 9
x - 3y = -6
Answer:
(9,5)
Step-by-step explanation:
Linear combination (also known as elimination) is trying to somehow combine the equations together so that it eliminates one variable in order to solve for the other one.
So you have
-4x+9y=9
x-3y =-6
In elimination, you want the equations to be in the same form which they are here in this case. You want one of the columns to contain opposites or sames.
If opposites, you add the equations.
If sames, you subtract the equations.
We have neither opposites or sames in either of the first two variable columns which is where we want one of these columns to be.
So I'm going to multiply the bottom equation by 3. This is not the only way. This is the way I'm going to do it. You could decide to multiply the bottom equation by 4 or -4 or -3 instead.
So anyways multiply bottom equation by 3. This is what my system looks like now:
-4x+9y=9
3x-9y=-18
----------------Now we get to add this equations because the 2nd column,
the y column, we have opposites.
------------------------adding now
-1x+0y=-9 -4+3=1 and -9+9=0 and 9+-18=0
-x =-9 -1x=-1*x=-x and 0y=0*y=0
x =9 Take opposite of both sides
Now once we find one variable we must obtain the other variable by replacing x with 9 and solving for y in one of the equations (don't use both-just choose one- doesn't matter which)
x-3y=-6 was the second equation before manipulation
Plug in 9 for x
9-3y=-6
Subtract 9 on both sides
-3y=-6-9
-3y=-15
Divide both sides by -3
y=5
So the solution is (x,y)=(9,5)
What are the sine, cosine, and tangent of 11pi over 6? 11π/6
Answer:
sin(11π/6) = -1/2cos(11π/6) = (√3)/2tan(11π/6) = -1/√3 = -(√3)/3Step-by-step explanation:
The reference angle is π/6, and the angle is in the 4th quadrant. So, sine and tangent will be negative while cosine is positive. You have memorized the values of trig functions for π/6, so you know ...
sin(π/6) = 1/2cos(π/6) = (√3)/2tan(π/6) = 1/√3Adjusting the signs to match those required for a 4-th quadrant angle, you have ...
sin(11π/6) = -1/2cos(11π/6) = (√3)/2tan(11π/6) = -1/√3Danny draws a transversal, t, on two parallel lines AB and CD, as shown below:
He makes the following table to prove that the alternate interior angles are equal:
Which is the missing justification? (6 points)
Corresponding angles formed by a transversal on parallel lines are supplementary.
Corresponding angles formed by a transversal on parallel lines are congruent.
Co-interior angles formed by a transversal on parallel lines are congruent.
Co-exterior angles formed by a transversal on parallel lines are congruent.
Answer: second option.
Step-by-step explanation:
When two parallel lines are intersected by a third line (which is called "Transversal"), the angles that are of the same side of the transversal (but one located in interior and the other one located in the exterior), are known as "Corresponding angles".
Corresponding angles are congruent.
You can observe that the angle 2 and the angle 6 are Corresponding angles. Therefore, the missing justification is: "Corresponding angles formed by a transversal on parallel lines are congruent."
Answer:
Corresponding angles formed by a transversal on parallel lines are congruent.
The result in a probability experiment is called an
Answer:
Step-by-step explanation:
outcome
PLZ HELP MARKIN BRAINIEST!!!
Answer:
d. (x - 5)(x - 5)
Step-by-step explanation:
x² - 10x + 25
we look for a two number when added gives you the sum -10 and when multiplied gives you the product 25
sum = - 10
product = 25
the two numbers are
-5,-5
x² - 5x - 5x + 25
(x² - 5x) (- 5x + 25)
x(x-5)-5(x-5)
(x-5)(x-5)
Hope this helps and if it does mark as brainliest.thx
Answer:
[tex]\large\boxed{x^2-10x+25=(x-5)(x-5)}[/tex]
Step-by-step explanation:
[tex]x^2-10x+25=x^2-2(x)(5)+5^2\qquad\text{use}\ (a-b)^2=a^2-2ab+b^2\\\\=(x-5)^2=(x-5)(x-5)[/tex]
Use the Distance Formula to find the distance between each pair of points.
[tex]\sqrt{(x2 - x1)^{2} + (y2 - y1)^{2} }= \\ \\\sqrt{(-4 - (-1))^{2} + (-1 - 4)^{2} }= \\\\\sqrt{-3^{2} + -5^{2} }= \\\\\sqrt{9 + 25 }=\\\sqrt{34 }=\\5.83[/tex]
Distance between each pair of points is: 5.83
The distance formula, derived from the Pythagorean theorem, is used to find the distance between two points. You subtract and square the x-coordinates, do the same with the y-coordinates, sum those results, and take the square root of the sum to get the distance.
Explanation:The distance formula in mathematics is used to determine the distance between two points in a coordinate plane. The formula is derived from the Pythagorean theorem and is represented as D = √[(x2-x1)² + (y2-y1)²]. Let's say we have two points A1(x1, y1) and A2(x2, y2).
Firstly, subtract the x-coordinates (x2 and x1) and then square the result. Secondly, subtract the y-coordinates (y2 and y1) and then square the result. Finally, add the values obtained in the first and second steps to get the square of the distance. To find the actual distance, take the square root of this sum.The final result gives you the distance between the two points in the cartesian plane.
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2 square root of 4 equals
[tex]2\sqrt4=2\cdot2=4[/tex]
Answer:
4
Step-by-step explanation:
2√4 = 2√(2^2) = 2·2 = 4
__
Or, any calculator can help you with this. The Google search box serves as input to that calculator.
Does anyone know the answer?
Answer:
When a number is halfway between two multiples of one thousand, round to "the larger multiple."
For example: If you have 852, the nearest thousand is 1000. So it should be round to 1000.
Answer:
rounded to the larger multiple.
Algebra Probability PLEASE HELP***
You have 6 friends who want to go to a concert with you, but you only have room in your car for 2 of them. To avoid accusations of favoritism, you have your friends draw straws: There are 4 long and 2 short straws, and the short straws win. How many possible pairs of friends could be chosen in this way?
Answer: 2 friends/1 pair
Step-by-step explanation:
Mainly because if you do the math, a pair of friends is 2. Knowing that there is 2 short straws (Which if those are the ones that are chosen you get to go), and 4 long straws. Only 2 friends are going to draw the short straws.
Hope this helped :)
Answer:
15 possible pairs of friends could be chosen in this way.
Step-by-step explanation:
Given : You have 6 friends who want to go to a concert with you, but you only have room in your car for 2 of them. To avoid accusations of favoritism, you have your friends draw straws: There are 4 long and 2 short straws, and the short straws win.
To find : How many possible pairs of friends could be chosen in this way?
Solution :
Total number of friends = 6
The space in the car is for 2 person.
Since, the order doesn't matter we have to choose 2 people out of 6 so we apply combination.
As There are 4 long and 2 short straws, and the short straws win.
i.e. that 2 friends were chosen.
So, Possible ways to find the pairs of friends is [tex]^6C_2[/tex]
Solving,
[tex]^6C_2=\frac{6!}{2!(6-2)!}[/tex]
[tex]^6C_2=\frac{6\times 5\times 4!}{2\times 1\times 4!}[/tex]
[tex]^6C_2=3\times 5[/tex]
[tex]^6C_2=15[/tex]
Therefore, 15 possible pairs of friends could be chosen in this way.
What is true of the function g(x) = –2x2 + 5? G(x) is the multiplication of g and x. –2x2 +5 is the input of the function. The variable x represents the independent variable. The variable g represents the input of the function
Answer:
See below.
Step-by-step explanation:
The variable x represents the independent variable. The dependent variable is the function g(x) . The value of g(x) depends on the value of x.
Answer:
The variable x represents the independent variable ( C )
Step-by-step explanation
Wich of following is(are) the solution(s) to |x+3| = 12
Answer: x=9
the answer to this is
x=9,-15
Answer:
x={9,-15}
Step-by-step explanation:
|x+3|=12 means
x+3 could be 12 or -12 since |12|=12 and |-12|=12 are true
x+3=12 x+3=-12
x=12-3 x=-12-3
x=9 x=-15
PLEASE HELP ME WITH THIS MATH QUESTION
Answer:
Permutations and combinations
Step-by-step explanation:
For any three songs chosen of the 8 options would use the formula of combinations of 8 taken by 3, to find which of the 3 to play first, permutation formula
An action movie production team needs glass spheres to hold a green liquid that looks like an explosive. If all of the available 3,392.92 cubic inches of the liquid is to be poured into 30 glass spheres, what should the diameter of each sphere be? Assume that each sphere is filled to the top.3 inches4 inches6 inches8 inches9 inches
Answer:
6 inches
Step-by-step explanation:
3392.92 cubic inches of liquid distributed in 30 spheres would give each sphere's volume to be:
[tex]\frac{3392.92}{30}=113.1[/tex]
Now we equate 113.1 to the formula for volume of a sphere and solve for r:
[tex]\frac{4}{3}\pi r^3=113.1\\r^3=\frac{113.1}{\frac{4\pi}{3}}\\r^3=27\\r=\sqrt[3]{27} =3[/tex]
The radius of each of those spheres is 3
We know diameter is twice the radius , so diameter would be 3 * 2 = 6 inches
Answer:
6 inches
Step-by-step explanation:
I just took a test on Plato/Edmentum with this question and this was the right answer
~Please mark me as brainliest :)
How long will it take to earn $1800 in interest if $6000 is invested at a 6% annual interest rate? how many years
Answer:
Total interest will $1800 after 5 years.
Step-by-step explanation:
It is given that the principle amount is $6000.
Rate of interest rate is 6% per annum.
Total interest is $1800.
Formula for simple interest is
[tex]I=\frac{P\times r\times t}{100}[/tex]
Where, P is principle, r is rate of interest in percent and t is time in years.
Substitute P=6000, r=6 and I=1800 in the above formula.
[tex]1800=\frac{6000\times 6\times t}{100}[/tex]
[tex]1800=\frac{36000t}{100}[/tex]
[tex]1800=360t[/tex]
Divide both sides by 360.
[tex]\frac{1800}{360}=t[/tex]
[tex]5=t[/tex]
Therefore the total interest will $1800 after 5 years.
Answer:
b. 5 years
Step-by-step explanation:
Julia opened a new flower shop, and her daily sales are modeled by f(x) = 2(1.25)x. Determine the rate of growth.
A.2%
B.125%
C.75%
D.25%
Answer:
D. 25%
Step-by-step explanation:
f(x) = 2 * (1.25)^x
This is in the form
y = a b^x
where b is 1 plus the growth rate
b = 1.25 = 1+growth rate
1.25 = 1 + growth rate
.25 = growth rate
25% = growth rate
The answer is D) 25%
Which graph correctly solves the system of equations below? y = − x2 + 1 y = x2 − 4
A) quadratic graph opening up and quadratic graph opening down. They do not intersect.
B) quadratic graph opening up and quadratic graph facing down. They intersect at negative 2, negative 3 and 2, negative 3.
C) Two intercepting parabolas are shown, one facing downward and one facing upward. The downward facing parabola has a maximum at (0,1) and intercepts the x axis at 1 and negative 1. The upward facing parabola has a minimum at (0,-4) and intercepts the x axis at 2 and negative 2
D) two quadratic graphs opening up. They intersect at 0, negative 4.
Answer:
C) Two intercepting parabolas are shown, one facing downward and one facing upward. The downward facing parabola has a maximum at (0,1) and intercepts the x axis at 1 and negative 1. The upward facing parabola has a minimum at (0,-4) and intercepts the x axis at 2 and negative 2
Step-by-step explanation:
As shown in the attached, the graph of y = -x² +1 has its vertex at (0, 1) and opens downward. It crosses the x-axis at ±1. The graph of y = x² -4 has its vertex at (0, -4), opens upward, and crosses the x-axis at ±2. The description of this graph matches choice C.
Alicia needs to purchase carpet to cover a triangular space. The space has a base length of 10 ft. and a height of 6.4 ft.How many square feet of carpet does Alicia need to cover the space?
Answer:
32
Step-by-step explanation:
Alicia needs 32 square feet of carpet to cover the space.
What is area of triangular space?Area of triangular space is 1/2 * length * height.
Given, space has base length of 10 ft. and a height of 6.4 ft.
Using the formula,
Area of triangular space is 1/2 * length * height = 1/2 * 10 * 6.4
= 32 square feet
Hence , Alicia needs 32 square feet of carpet to cover the space.
To learn more about the triangular spaces ;
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The value of a collector’s item is expected to increase exponentially each year. the item is purchased for $500. after 2 years, the item is worth $551.25. which equation represents y, the value of the item after x years? y = 500(0.05)x y = 500(1.05)x y = 500(0.1025)x y = 500(1.1025)x
Answer:
[tex]y=500(1.05)^x[/tex]
Step-by-step explanation:
The standard form for an exponential equation is
[tex]y=a(b)^x[/tex]
We have 2 unknowns, a and b, but that's all good because we have 2 (x, y) coordinates we can utilize in order to find a and b. In our coordinate pair, x is the number of years gone by and y is the value after that number of years. The problem tells us that an item was purchased for $500. That translates to "before any time has gone by, the initial value of the item is $500". In other words, with x being time, no time has gone by, so x = 0. When x = 0, y = 500. (0, 500). Do the same for the next set of numbers. When x = 2 years gone by, the value is $551.25, so the coordinate is (2, 551.25). Now we use them to find a. Use the first coordinate:
[tex]500=a(b)^0[/tex]
Anything raised to the 0 power = 1, therefore:
[tex]500 = a(1)[/tex] and a = 500.
Now onto the next coordinate point using the a value we just found:
[tex]551.25 = 500(b)^2[/tex]
Divide both sides by 500 to get
[tex]1.1025=b^2[/tex]
so b = 1.05.
Now we have the values for a and b, so we fill in:
[tex]y = 500(1.05)^x[/tex]
A recipe for a batch of 3 dozen chocolate chips cookies calls for 3 cups of flour, 1 cup of sugar, and 2 cups of chocolate chips. How much of each ingredient should be used to make 2 dozen cookies?
bearing in mind that a whole is simply same/same or just 1.
3 dozen, there are 3 dozens in 3 dozen, obviously
dozen dozen dozen.
in 2 dozens, there are 2 of course
dozen dozen.
if 3 dozens is three thirds namely 3/3 = 1 = whole, then 2 dozens is just two of those dozens, namely two thirds, 2/3.
so if we use that many ingredients to make a whole three thirds, how much will it be to make only two thirds of it? well, is simply their product, so we'll simply multiply each ingredient amount by 2/3.
[tex]\bf \stackrel{flour}{3\cdot \frac{2}{3}}\qquad \stackrel{sugar}{1\cdot \frac{2}{3}}\qquad \stackrel{chips}{2\cdot \frac{2}{3}}\qquad \implies \qquad \stackrel{flour}{2}\qquad \stackrel{sugar}{\frac{2}{3}}\qquad \stackrel{chips}{\frac{4}{3}}[/tex]
. A raffle prize of dollars is to be divided among 7x people. Write an expression for the amount of money that each person will receive.
Answer:
P/7x dollars.
Step-by-step explanation:
If the raffle prize is P dollars, then each person will receive P/7x dollars.
Answer with explanation:
Let total Prize money = $ P
Number of people into which this money is divided =7 x People
Amount of money that each person will Receive
[tex]=\frac{\text{Total Prize Money}}{\text{Number of people into which this money is divided}}\\\\=\frac{P\text{Dollars}}{7x}[/tex]
Is the histogram symmetric, skewed right, or skewed left? Explain your answer .
Answer:
It’s skewed left
Step-by-step explanation:
The main mass of the graph is on the left. Follow the shape of the graph to find this
To determine if a histogram is symmetric or skewed, we assess the relative positions of the mean, median, and mode. A symmetric distribution has these three values approximately equal and the histogram's halves mirror each other. A right-skewed histogram has a tail extending right, whereas a left-skewed histogram's tail extends left.
Explanation:When analyzing whether a histogram is symmetric, skewed right, or skewed left, certain aspects of the distribution of data are considered. Symmetry in a histogram indicates that if a vertical line were drawn at some midpoint, the left and right sides would be mirror images. In a symmetric distribution, the mean, median, and mode are usually equivalent or very close to each other. To determine skewness, we look at the arrangement of these three measures: for a skew to the right, the mode is often less than the median, which is less than the mean. Conversely, a distribution skewed to the left typically has the mean less than the median, which is less than the mode.
A histogram for a right-skewed distribution will often show a tail extending to the right, indicating that larger numbers in the dataset are more spread out. On the other hand, a histogram with a left-skewed distribution will show a tail that extends to the left, which implies that the lower numbers are more spread out.
If h represents the number of hours the Sun was up today, which quantity is represented by the function ?
the number of minutes the Sun was up today
the number of hours the Sun was down today
the number of minutes the Sun was down today
the fraction of the time the Sun was up today
Let h = number of hours the Sun was up today.
There are 24 hours in one day.
So, we are looking at the fraction h/24.
Answer: The fraction of the time the Sun was up today.
The function that multiplies the number of hours the Sun was up (h) by 60 represents the number of minutes the Sun was up today.
Explanation:If h represents the number of hours the Sun was up today, to calculate the number of minutes the Sun was up, we would multiply h by 60, since there are 60 minutes in an hour. Therefore, the function that multiplies h by 60 will give us the number of minutes the Sun was up today. On the contrary, to find the number of hours the Sun was down today, we would typically take the total number of hours in a day, which is 24, and subtract h from it. To represent the fraction of the time the Sun was up today, we would use the ratio of h to 24, since there are 24 hours in a whole day. Thus, the correct quantity represented by the function when h is multiplied by 60 is the number of minutes the Sun was up today.
4. If a decorative sign in the form of a circle has a diameter of 10 feet, what it the area of the sign, to the nearest square foot?
A. 79 ft2
B. 31 ft2
C. 157 ft2
D. 16 ft2
For this case we have that by definition, the area of a circle is given by:
[tex]A = \pi * r ^ 2[/tex]
Where:
A: It is the radius of the circle
We have as data that the diameter is 10 feet, then the radius is half, that is, 5 feet.
Substituting:
[tex]A = \pi * (5) ^ 2\\A = 25 \pi\\A = 78.5[/tex]
Rounding out we have that the circle area is[tex]79 \ ft ^ 2[/tex]
Answer:
Option A
Answer:
A. 79 ft²
Step-by-step explanation:
Area of a circle is given by the formulae
[tex]A=\pi *r^2[/tex]
where r is the radius of the circle
Given diameter= 10 ft
Radius of a circle is one half the diameter of a circle.
Radius = [tex]r=\frac{10}{2} =5ft[/tex]
Area=[tex]\pi *5^2=3.14*5^2=78.5ft^2\\\\=79ft^2[/tex]
Jenny biked 3 miles less than twice the number of miles Marcus biked. Jenny biked a total of 4 miles. Write an equation to determine how many miles Marcus biked.
Final answer:
To determine how many miles Marcus biked, we can write the equation 2m - 3 = 4, where 'm' represents the number of miles Marcus biked. Solving this equation, we find that Marcus biked 3.5 miles.
Explanation:
To write an equation to determine how many miles Marcus biked, we can use the given information. Let's assume that the number of miles Marcus biked is represented by the variable 'm'. According to the problem, Jenny biked 3 miles less than twice the number of miles Marcus biked. So, we can write the equation as: 2m - 3 = 4.
To solve this equation, we need to isolate the variable 'm'. Adding 3 to both sides of the equation, we get: 2m = 7. Finally, dividing both sides by 2, we find that Marcus biked 3.5 miles.
Maria invests $1000 in a savings account that pays 4% interest compounded annually. Write an exponential equation to find the value of the account, A, at the end of five years.
Answer:
A = 1000·1.04^5
Step-by-step explanation:
When 4% of the amount in the account is added to the amount in the account, the result is that amount is multiplied by 1.04:
amount + 0.04×amount = amount×(1 + .04) = 1.04×amount
The account is multiplied this way for each of 5 years. An exponent is used to signify repeated multiplication, so we can write the account balance as ...
A = ((((1000×1.04)×1.04)×1.04)×1.04)×1.04 = 1000×1.04^5
The exponential equation that represents the value of the account, ( A ), after five years is [tex]\[ A = 1000 \times (1.04)^5 \][/tex]
To determine the value of Maria's savings account after five years with annual compounding interest, we use the formula for compound interest:
[tex]\[ A = P \left(1 + \frac{r}{n}\right)^{nt} \][/tex]
Given:
( P = 1000 ) dollars (initial investment)
( r = 0.04 ) (4% interest rate per year)
( n = 1 ) (compounded annually)
( t = 5 ) years
Now, substitute these values into the formula:
[tex]\[ A = 1000 \left(1 + \frac{0.04}{1}\right)^{1 \cdot 5} \][/tex]
[tex]\[ A = 1000 \left(1 + 0.04\right)^5 \][/tex]
[tex]\[ A = 1000 \times (1.04)^5 \][/tex]
Calculate [tex]\( (1.04)^5 \)[/tex]:
[tex]\[ (1.04)^5 \approx 1.21665 \][/tex]
Now multiply by 1000:
[tex]\[ A \approx 1000 \times 1.21665 \][/tex]
[tex]\[ A \approx 1216.65 \][/tex]
Therefore, the value of Maria's savings account at the end of five years, with annual compounding interest at 4%, is approximately [tex]\( \$1216.65 \)[/tex].
To summarize, the exponential equation that represents the value of the account, ( A ), after five years is:
[tex]\[ A = 1000 \times (1.04)^5 \][/tex]