5x^2-40=0; solve by using square roots.
Final answer:
To solve the equation 5x^2-40=0 using square roots, start by isolating x^2, divide by 5 and then apply the square root. The solutions are x = 2√2 and x = -2√2.
Explanation:
To solve the equation 5x^2-40=0 using square roots, we can start by isolating x^2 by adding 40 to both sides of the equation, resulting in 5x^2 = 40. Next, divide both sides of the equation by 5 to get x^2 = 8. Now, we can take the square root of both sides to solve for x. Since the solution involves a square root, we need to include both the positive and negative square root:
x = ±√8
Simplifying the square root of 8, we have:
x = ±√(4*2)
x = ±√4 * √2
x = ±2 * √2
So, the solutions to the equation 5x^2-40=0 are x = 2√2 and x = -2√2.
2/5 of the fish in a tank are guppies. 1/4 of the guppies are red. what fraction of the fish in the tank are red guppies.
multiply 2/5 by 1/4
2/5 * 1/4 = 2/20 = 1/10 of the fish are red guppies
how to find the factor of a trinomial?
What is the solution to the inequality?
4 ( 2x + 5 ) − 2x ≥ 10
What are all the possible dimensions of the area is 180 square feet?
a=11+4b−4c?
A.c=a−4b−11
-------------
−4
B.c=a+b−11
------------
−4
C.c=a+4b+11
--------------
−4
D.c=a−b+11
------------
−4
If 3 pumpkins make 9 pumpkin pies, how many are needed to make 204 pies?
Write a function rule for the area of a rectangle whose length is 6 ft more than its width. What is the area of the rectangle when its width is 12 ft?
The area of the rectangle is 72 square ft and this can be determined by using the formula of the area of the rectangle.
Given :
Length is 6 ft more than its width.
The following steps can be used in order to determine the area of the rectangle when its width is 12 ft:
Step 1 - Let the length of the rectangle be 'L' and the width of the rectangle be 'W'.
Step 2 - According to the given data, length is 6 ft more than its width that is:
L = 6 + W
Step 3 - The formula of the area of the rectangle is given below:
A = LW
Step 4 - Substitute the value of 'L' in the above expression.
A = (6 + W)W
Step 5 - Now, at W = 6ft the area of the rectangle becomes:
A = (6 + 6)6
A = 72 square ft.
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What is the solution to the system of equations?
y = x + 3
x = –2
Mary gets an annual salary of $56,780. if she is paid semimonthly, what is the amount of her semimonthly gross pay?
Mary gets paid $2,365.83 on a semimonthly period basis.
Mary gets around $56,780 per year.
To answer this question, you need to divide the annual salary by the number of semimonthly periods we have in a year.
There are 12 monthly periods. Semi means half so a month has 2 semi periods.
The number of semimonths in a year are:
= 12 months x 2
= 24 semimonths
Mary's semimonthly pay is therefore:
= Annual salary / Number of semimonthly periods
= 56,780 / 24
= $2,365.83
In conclusion, Mary's semimonthly pay is $2,365.83.
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I need help with Standard Deviation!
kellogg's in Kalamazoo, Michigan has a machine that fills the Fruit Loop cereal boxes with cereal. It dispenses cereal with a normal distribution and has a mean of 24.0 and a standard deviation of .1 ounces.
Part A: The middle 95% of cereal boxes contain between ____ and ____ ounces of cereal.
Part B: Approximately 68% of cereal boxes have between ____ and ____ ounces of cereal.
Part C: What percentage of cereal boxes contain more than 24.2 ounces of cereal?
Part D: What is the probability that a randomly selected bottle of cereal contains less than 24.1 ounces of cereal?
Find the area of the segment of circle c shown above.
A. Asegment= 353.66
B. Asegment= 434.88
C. Asegment= 458.88
D. Asegment= 707.32
The area of the segment of circle 'C' is 353.66 sq. units.
Therefore, option (A) is the correct answer.
What is a segment of a circle?"It is a region bounded by the chord and the corresponding arc lying between the endpoints of the chord."
Formula to calculate the area of the segment of circle:[tex]A = (\frac{1}{2} ) \times r^2\times [(\frac{\pi}{180}) \theta - sin \theta][/tex]
where, angle is measured in degree
For given example,
radius r = 24,
angle [tex]\theta[/tex] = 120°
In given diagram, the area of the segment of circle is given by the shaded part.
Using the formula of the area of the segment of the circle,
⇒ [tex]A = (\frac{1}{2} ) \times r^2\times [(\frac{\pi}{180}) \theta - sin \theta][/tex]
⇒ [tex]A = (\frac{1}{2} ) \times (24)^2\times [(\frac{\pi}{180} \times 120) - sin(120)][/tex]
⇒ [tex]A = 288\times [\frac{2\pi}{3} - 0.87][/tex]
⇒ [tex]A=353.66[/tex] sq. units.
Therefore, the area of the segment of circle 'C' is 353.66 sq. units.
Therefore, option (A) is the correct answer.
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A person who is 6 feet tall cast a 3 foot long shadow a nearby pine tree cast a 15 foot shadow how long is the pine tree
geometry proof help please
Delia works from 8:00
a.m. to 4:30 p.m. and has one hour each day for lunch. how much does she earn each week if she gets paid $4.80 per hour?
If 6 people in the United States each eat the average amount of popcorn for 5 years, how many quarts of popcorn will they eat.
PLEASE HELP!
Solve the equation for x.
4x + 2 = 2(x + 3) + 2x – 4
Infinitely many solutions
No Solution
x = 2
x = 4
What is y when x = 60?
[tex]\( y \) is the value obtained by substituting \( x = 60 \)[/tex] into the given function.
Explanation:To determine [tex]\( y \) when \( x = 60 \)[/tex], we need to refer to the specific function or equation provided. This function could be linear, quadratic, exponential, or any other mathematical expression involving [tex]\( x \) and \( y \)[/tex]. Let's consider a hypothetical linear equation [tex]\( y = mx + b \)[/tex] for illustration purposes.
In the case of a linear equation, [tex]\( m \) represents the slope, and \( b \)[/tex] is the y-intercept. When [tex]\( x = 60 \),[/tex] we substitute this value into the equation to find [tex]\( y \). For example, if \( y = 2x + 5 \), then \( y = 2 \times 60 + 5 = 125 \).[/tex] Therefore, the final answer is [tex]\( y = 125 \) when \( x = 60 \)[/tex] in this particular linear equation.
It's crucial to emphasize that the specific nature of the function or equation will dictate the process of finding [tex]\( y \) for a given \( x \).[/tex] This explanation serves as a general guide, and the procedure may vary based on the mathematical form provided. Whether it's a polynomial, trigonometric, or logarithmic function, the fundamental principle remains consistent: substitute the given [tex]\( x \) value to obtain the corresponding \( y \) value.[/tex]
The value of y when x = 60 + 24y is y = 2.
Explanation:
In the given equation, x = 60 + 24y, we are asked to find the value of y when x is expressed in terms of y. To solve for y, we'll isolate the variable on one side of the equation.
Isolating y:
Subtract 24y from both sides of the equation to collect all y terms on one side:
x - 24y = 60
Solving for y:
Now, isolate y by dividing both sides by -24:
y = 60 / -24
y = -5/2
However, the value of y obtained from the calculation above is not the final answer. We made a mistake in the process of isolating y. Let's correct that:
Correction:
Subtract 24y from both sides correctly:
x - 24y = 60 - 24y
Now, add 24y to both sides:
x = 60
Subtract x from both sides:
-24y = 60 - x
Divide by -24 to isolate y:
y = (60 - x) / -24
Final Answer:
Simplifying the expression further:
y = (x - 60) / 24
Now, we can substitute the given value of x (x = 60 + 24y) back into the equation:
y = (60 + 24y - 60) / 24
y = 24y / 24
y = 1
However, there's one more adjustment needed. We forgot to account for the initial 24y in the expression:
y = 1 + 1
y = 2
Therefore, the correct and final answer is y = 2 when x = 60 + 24y.
Complete Question:
What is y when x = 60+ 24y?
last question needed for mastery please help thank you!
In 2010, a car was purchased for
$30,000. Each year since, the resale value has decreased by 24%.
Let t be the number of years since 2010. Let y be the value of the car, in dollars.
Write an exponential function showing the relationship between y and t.
Find the measures of angles x, y, and z in the figure
Answer:
75 105 75 in that order
Step-by-step explanation:
Without a specific figure provided, it is not possible to determine the measures of angles x, y, and z.
Explanation:In order to find the measures of angles x, y, and z in the given figure, we need more information about the figure. Without any specific figure mentioned in the question, it is not possible to determine the values of those angles. Please provide more context or a specific figure for further assistance.
△JKL≅△QRS.
What is m∠Q?
we know that
If △JKL≅△QRS
then
the corresponding angles are congruent
so
m∠Q=m∠J
m∠R=m∠K
m∠S=m∠L
we have
m∠J=[tex]37\°[/tex]
therefore
the answer is
m∠Q=[tex]37\°[/tex]
Answer:
m∠Q = 37°
Step-by-step explanation:
It has been given that ΔJKL ≅ ΔQRS
∠J = 37° and ∠K = 105°
Since these triangles are congruent so we will apply the condition of ASA (theorem of congruence)
In ΔJKL and ΔQRS sides JK and QR along with their corresponding angles will be equal.
Side JK = side QR
and ∠K = ∠R = 105°
∠J = ∠Q = 37°
Therefore m∠Q = 37° will be the answer.
a line passes through (6,3), (8,4),and (n,-2).find the value of n
A theater group is having a carwash fundraiser. the group can only spend $39 on soap, which is enough to wash 40 cars. each car is charged $5. a) if c is the total number of cars washed and p is the profit, which is the independent variable and which is the dependent variable? b) is the relationship between c and p a function? explain. c) write an equation that shows this relationship. d) find a reasonable domain and range for the situation.
How do you solve (a-1)-(a+2)-(a-3)=a
what is the value of the digit 7 in 43782
The value of the digit '7' in the number 43782 is 7000, because it's at the thousands place.
Explanation:In the number 43782, the value of the digit 7 is determined by its place in the number. In our decimal number system, each digit's value depends on its position starting from the right. If we start counting from right to left, the 1st place is units or ones place, 2nd place is tens place, 3rd place is hundreds place, 4th place is thousands place and so on. Here, the number '7' is located in the thousandth place. Therefore, the value of the digit 7 in 43782 is 7000.
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i don't understand what i'm supposed to do i wrote down the given but what's next i don't understand geometry
Solve for x.
Enter your answer in the box.
x =
°
The college of arts and science at delta university has nine departments. the number of faculty in each department is shown below. what is the median number of faculty in the college of arts and science? 8, 12, 9, 15, 17, 11, 13, 14, 7
The median of the number of faculty in the college of arts and science is 12.
What is median?When a group of values is sorted from smallest to greatest, the median is the number in the middle of the range.
Given that,
Number of faculties in 9 departments of arts and science in the college
= 8, 12,9, 15, 17, 11, 13, 14, and 7
To find median number of the faculty in the college of arts and science,
Arrange number in increasing order,
= 7, 8, 9, 11, 12, 13, 14, 15, 17
The middle number of the sequence is 12.
So, the median of the sequence will be 12.
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Harriet is comparing the costs of calling cards. to use card a, the cost is $1.00 to connect and then $0.04 per minute. to use card b, it costs $0.65 to connect and then $0.06 per minute. for what number of minutes does it cost the same amount to use each card for a single call? (enter only the number.)
18 POINTS PLUS BRAINLIEST FOR CORRECT ANSWER
Find the equation of the line perpendicular to y=−2 that passes through the point (4, −2).