Answer:
14
Step-by-step explanation:
-2x^3 - 2x^2 - 4x-2
Let x = -2
-2 (-2)^3 - 2 (-2)^2 -4(-2) -2
Exponents first
-2 (-8) -2 (4) -4(-2) -2
Then multiply
16 -8 +8 -2
Then add and subtract
14
What is the slope of the line given by the equation below? y = - 3x + 5
Answer:
-3
Step-by-step explanation:
As per the given equation, the slope of the line is -3.
In mathematics, the slope of a line is a fundamental concept that describes the steepness or incline of the line. It measures how much the y-coordinate changes relative to the corresponding change in the x-coordinate. The slope is represented by the coefficient of the x-term in the equation of the line, when it is written in slope-intercept form
(y = mx + b).
The given equation is y = -3x + 5. Here, -3 is the coefficient of the x-term, which is the slope of the line. Since the equation is already in slope-intercept form (y = mx + b), we can directly identify the slope as -3.
A slope of -3 means that for every 1 unit increase in the x-coordinate, the y-coordinate decreases by 3 units. Conversely, for every 1 unit decrease in the x-coordinate, the y-coordinate increases by 3 units. The negative sign indicates that the line is decreasing from left to right, sloping downwards.
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You buy an electric guitar for 30% off the original price. If the original price is $450, how
much did
you pay?
Answer:
$315
Step-by-step explanation:
The excavation for a house and the trucks to carry away the material have the dimensions shown. About how many level truck loads are necessary to remove all the dirt? The truck is 5.0 for the length 2.0 for the height 3.0 for the side base The house is 4.0 for the height 14.5 for the length and 11.0 for the side base 100 points !!!!! and brainlist
Answer:
This means that about 21 level truck loads are necessary to remove all dirts.Step-by-step explanation:
To get the number of level truck loads needed to remove all the dirts in the house, first we need to calculate volume of the truck and the house.
Volume of truck = Length * Breadth * Height
If the truck is 5.0 for the length 2.0 for the height 3.0 for the side base;
Volume of the truck = 5*2*3
Volume of truck = 30
For the house;
Volume of house = Length * Breadth * Height
If the house is 4.0 for the height 14.5 for the length and 11.0 for the side base, then
Volume of the house = 4*14.5*11 = 638
Number of level truck loads needed to remove all the dirts = Volume of house/Volume of the truck = 638/30 ≈ 21.3
This means that about 21 level truck loads are necessary to remove all dirts.
Final answer:
To find the number of truck loads needed to remove all the dirt excavated for the house, calculate the volume of dirt excavated and divide by the volume the truck can carry. In this case, approximately 11 truckloads are required.
Explanation:
The number of level truck loads needed to remove all the dirt can be calculated by first finding the volume of dirt excavated for the house and then dividing it by the volume the truck can carry.
Volume of dirt excavated for the house = 15 m x 11 m x 1 m = 165 m3
Number of truck loads = Volume of dirt excavated / Volume truck can carry
Number of truck loads = 165 m3 / 15 m3 = 11 truck loads
Find the volume of the cone. Round your answer to the nearest tenth if necessary. Use 3.14 for a.
19 cm
5 cm
hs
The volume of the cone is about
cm3.
Answer:
volume of cone= 1/3πr²h
1×3.14×5×5×11
3
863.5
3
287.83cm³
Perform the following operation
and express the answer in
scientific notation.
4.0x10^5 x 3.0x10^3
Answer:
12x10^8
Step-by-step explanation:
This is easy
What is the equation of the third rocket?
Final answer:
The equation of the third rocket is likely referring to the Tsiolkovsky rocket equation Δv = ve · ln(mo/m), which calculates the change in velocity of a rocket by considering the expelled fuel mass, exhaust velocity, and the rocket's initial and final mass.
Explanation:
The equation of the third rocket is not explicitly provided in the question, but we can infer it relates to the Tsiolkovsky rocket equation which describes the motion of a rocket. This rocket equation is fundamental in understanding how rockets achieve motion through the expulsion of fuel mass at a high speed, thereby increasing their velocity. This change in velocity Δv is the result of the thrust imparted by the propellant's mass expulsion and is calculated using the equation: Δv = ve · ln(mo/m), where Δv is the change in velocity, ve is the effective exhaust velocity, mo is the initial total mass, and m is the final total mass of the rocket.
From the information provided, we can use the rocket's mass flow rate and the given velocity function to integrate and determine the rocket's position over time. When the thrust ends at t3 = 4.0 s, the position formula r(t) involves the integration of the velocity function, resulting in a function of time with an integration constant D.
The physical principle behind all rocket propulsion is Newton's third law of motion. The motion of the rocket is also described by factors such as the exhaust velocity, rate of fuel expulsion, and the total mass. To maximize acceleration, the non-fuel mass of the rocket must be minimized, enabling the spacecraft to achieve the necessary velocities for space missions.
What conclusion can you draw about the conditional relative frequency of the results?
Answer: A resident in the group who supports the tax is likely to be male
Step-by-step explanation:
HELP HELP HELP HELP HELP HELP!!!!!!
Answer:
The answer is part B
Step-by-step explanation:
The equation given is y = 4500 - 450p
y is the no of demand units
p is the price
let price be 1 dollar.
Therefore,
y = 4500 - 450x1
y = 4050
Now, let the price be 2 dollars.
y = 4500 - 450x2
y = 3600
Subtract the two values and the answer is 450.
This means that for each dollar increased, the no of demand units falls by 450
A regular octagon has a radius of 6 ft and a side length of
4.6 ft.
What is the approximate area of the octagon?
O
71 112
101 f12
110 112
202112
46
Answer:
Area of the regular octagon is approximately 102ft²Step-by-step explanation:
Given the radius and length of a side of regular octagon as shown;
radius = 6ft and length of side = 4.6ft
Area of a regular octagon is expressed as [tex]A = 2(1+\sqrt{2} )a^{2}[/tex] where a is the length of one side. Given a = 4.6ft
Area = [tex]A = 2(1+\sqrt{2} )(4.6)^{2}\\[/tex]
[tex]= 2(1+\sqrt{2} )*21.16\\= (2+2\sqrt{2})*21.16\\ = 4.83*21.16\\= 102.20ft^{2} \\[/tex]
Area of the regular octagon is approximately 102ft²
The approximate area of a regular octagon with a radius of 6 ft and a side length of 4.6 ft is about 110 ft², found using the area formula for regular polygons.
To approximate the area of a regular octagon, one can break it down into triangles or use a formula. In this case, let's use the formula for the area of a regular polygon, which is: A = (1/2) × Perimeter × Apothem. The apothem can be found using trigonometry since we have a regular octagon, or we could calculate the area as eight identical isosceles triangles, where each triangle's area is (1/2) × base × height.
The student has provided that the side length (s) is 4.6 ft. For a regular octagon, we have 8 such sides. Therefore, the perimeter (P) is P = 8s = 8 imes 4.6 ft = 36.8 ft. Assuming the radius given is the apothem, we can directly calculate the area using the formula:
A = (1/2) × P × Apothem = (1/2) × 36.8 ft × 6 ft = 110.4 ft².
The approximate area of the octagon is therefore about 110 ft², after rounding off to the nearest whole number (due to the significant figures rule).
Since stocks can be traded online, which purpose is best served by markets?
O Markets regulate transactions.
O Markets are where the trades actually occur.
O Markets sell the assets to be traded.
O Markets ensure that the transactions are secure.
-
--
Answer:
Markets ensure that the transactions are secure
Step-by-step explanation:
The purpose best served by markets in the context of online stock trading is that markets are where the trades actually occur.
Option B is the correct answer.
What is a stock?A stock is a type of security that represents ownership in a company. When a company needs to raise funds for its operations or expansion, it can issue stocks to investors in exchange for capital.
We have,
The market provides a platform for buyers and sellers to come together and trade stocks.
While online trading platforms allow investors to place orders and manage their investments, it is the market that facilitates the actual exchange of securities between buyers and sellers.
Markets provide liquidity to investors by enabling them to easily buy and sell stocks, and they also help to determine the prices of securities based on supply and demand.
While markets may have rules and regulations in place to ensure the security and fairness of transactions, their primary purpose is to facilitate trading.
Thus,
The purpose best served by markets in the context of online stock trading is that markets are where the trades actually occur.
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y = f(x) = 2x
Find f(x) When x = -3.
Express as a decimal, rounding to the nearest
thousandth.
The function y = f(x) = 2x, when evaluated for x = -3, gives the result as -6. Expressed in decimal format to the nearest thousandth, this is -6.000.
Explanation:This question relates to the function y = f(x) = 2x. To work out f(x) when x = -3, you simply substitute -3 into the function. So, you have 2 * -3 which equals -6.
In decimal format, rounded to the nearest thousandth, as stipulated in the question, this is -6.000.
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I need help on this please
Answer:
0.16
Step-by-step explanation:
brailiest please:))
Answer:
P(compact cars) = 4/25 or .16
Step-by-step explanation:
We know that there are 13 trucks, 8 vans, and 4 compact cars.
Let P denotes the probability of an event
Now we are asked to find the probability of compact cars
Number of favorable events = number of compact cars = 4
total number of outcomes = 13+8+4 = 25
hence, P(compact cars) = number of favorable events/total outcomes
=4/25 or .16
g(t) = -2t^3 - 2t^2
f(t)=t-3
Find g(-3) + f(-3)
A) 32B) 10
C) 30 D) -30
Answer:
30
Step-by-step explanation:
g(t) = -2t^3 - 2t^2
f(t)=t-3
g(-3) = -2 (-3)^3 - 2(-3) ^2 =-2(-27) - 2(9) = 54 - 18 =36
f(-3) = -3-3 = -6
g(-3) + f(-3) = 36 + -6 = 30
i need help.
solve for k.
881 = k - (-243)
k=?
Answer:
638
Step-by-step explanation:
1. Isolate the variable 881 = k - (-243)
-243 -243
2. combine like terms 881 - 243 = k
3. answer 638
Which algebraic expression represents the phrase "seven more than half of a number"?
0 -7 + 8x
© 2x+7
Answer:
1/2x +7
Step-by-step explanation:
Let the unknown number be x
We want 1/2 of the number
1/2x
Then 7 more than (add)
1/2x +7
Alyssa has two summer jobs: camp counselor with a community organization and babysitting her neighbor’s daughter. He earns $15 per hour as a counselor and $10 per hour babysitting. Because of her age, Alyssa can work no more than 40 hours each week, and she hopes to earn at least $450 each week.
Using c for the number of hours Alyssa works as a camp counselor and b for the number of hours she babysits, write two inequalities to represent the number of hours she can work and the amount of money she can earn.
Answer:counselor more than or equal to 10 hours
Baby sitting more than or equal to 30 hours
Step-by-step explanation:
Help please will give brainly!! What do you notice about the relationship between ice cream sales and temperature? “As the temperature blank, the ice cream sales blank”- you should fill in the blank parts with what you think talking about increase or decrease
Answer:
As the temperature increases, the ice cream sales increase.
Angus is painting a room with 400 square feet of wall space that needs to be painted. He has painted 58% of the walls already. What area of the walls has Angus NOT painted?
Answer:
232 square feet
Step-by-step explanation:
400x58%=232
A line on a coordinate plane passes through the point (-3,5) and has a slope of 2.When the line passes through x = 4, what is the value of y? Enter the answer in the box.
Answer:
y = 19
Step-by-step explanation:
y = mx + b, where m is the slope and b is the y intercept. We dont know the y-intercept but we now the slope and a point so we can substitute these values in the equation and solve for b.
Solving for b we will end up with b = 11.
now we have the equation y= 2x + 11
we now that x = 4 , so we plug it in.
we will end up with y = 19.
Hope this helps
Final answer:
When the line with a slope of 2 that passes through (-3,5) reaches x = 4, the value of y is 19.
Explanation:
To find the value of y when the line passes through x = 4, we can use the point-slope form of the equation of a line, which is y - y1 = m(x - x1), where m is the slope and (x1, y1) is a point on the line. We know that the line passes through the point (-3, 5) and has a slope of 2. Plugging these values into the point-slope formula gives us:
y - 5 = 2(x - (-3))
y - 5 = 2(x + 3)
y - 5 = 2x + 6
y = 2x + 11
Now we can find the value of y when x = 4:
y = 2(4) + 11
y = 8 + 11
y = 19
Therefore, when the line passes through x = 4, the value of y is 19.
A two story mall has seven entrances on the first floor. Inside, it has four escalators, nine sets of stairs, and two elevators for customers to travel between floors. If a customer is on the second floor, how many ways can they leave the mall.
Answer:
They can leave 7 ways.
Answer:
The answer is 105. 15 times 7.
You can only take 1 of 15 ways down and 1 of 7 doors out.
Step-by-step explanation:
Write two numbers that multiply to the value on top and add to the value on bottom
mr. bird leaves for a walk at 7:50 a.m. she allows 25 minutes later what time does she arrive to work
Answer: 8:15
Step-by-step explanation:
If she leaves at 7:50 and arrives to work 25 minutes later, then she will get there at 8:15.
Something easy you could use:
7:50 25
+ 10 -10
____ ___
8:00 15
+ 15 -15
____ ____
8:15 0
Name each of the following lines, line segments, and rays.
Answer:
A. Line segment
B. Ray
C. Line
D. Ray
Step-by-step explanation:
A line is a straight path of points that has no beginning or end.
A line segment is a portion of a line that has two endpoints.
A ray is a portion of a line which has one endpoint and extends forever in one direction.
The following will be named as follows:
a. line segment GH
b. ray KL
c. line YZ
d. ray EF
Recall:
A line contains a set of points with both ends extending further.A line segment has two endpoints.A ray has just one endpoint and the other end extending further.Therefore, the following will be named as follows:
a. line segment GH
b. ray KL
c. line YZ
d. ray EF
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Which is most likely the correlation coefficient for the set
of data shown?
0 -0.83
0 -0.21
O 0.21
O 0.83
2
3
4
Answer:
-0.21
Step-by-step explanation:
The solution is, -0.21 , is the most likely the correlation coefficient for the set of data shown.
What is Correlation coefficient ?A correlation coefficient is a numerical measure of some type of correlation, meaning a statistical relationship between two variables. The variables may be two columns of a given data set of observations, often called a sample, or two components of a multivariate random variable with a known distribution.
here, we have,
From the scatter plot that is shown in the graph above, we can observe that the set of data represented are not clustered far apart from each other along the line of best fit.
This suggest a correlation coefficient of lesser value close to zero which shows weaker correlation between variables.
Also, we can observe that There's a downward slope signifying a negative relationship.
As one variable increases, the other variable decreases.
Therefore the correlation coefficient that will match the set of data shown is -0.21.
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plslslslslsl i need help ASAP
12 points!!
Answer:
10%
Step-by-step explanation:
Take the original amount and subtract the new amount
270-243=27
Divide this by the original amount
27/270 = .10
Multiply by 100 to change to percent form
10%
Since the amount went down, we know this is a decrease
etyfhjrutgjbkvlc;sofhgjl;b'vcz';stdfljghcb/vbzdgrsy;tdughokmbnl ;/
Please help!!!
I don't understand....
I would really like an explanation..
Answer:
it would be yes
Step-by-step explanation:
LN and XZ are equal to eachother which means the triangles are the same size therefore means LNM = XZY
Answer:
yes
Step-by-step explanation:
because if you match them with the same group then they come out as congruent
I don't know if that is well explain
If the probability of a chance event is 0.75, it is less likely to happen
than which of the following probabilities of another chance event?
Select one:
0.3
0.55
0.55
0.7
0.95
Answer:
0.95
Step-by-step explanation:
The higher the probability, the higher the likelyhood it will happen.
.95>.75
Answer:
0.95
Step-by-step explanation:
Write the statement "dividing the sum of x and 5 by 6 is 3 more than x" as a mathematical equation.
[tex]\frac{x+5}{6} -3=x[/tex]
Try to say it and write what you say, that helped me learn how to do this. I hope this helps.
please help I have no clue what I'm doing
Answer:
[tex] \frac{3x}{2x - 6} + \frac{9}{6 - 2x} = [/tex]
[tex] \frac{3x}{2x - 6} + \frac{9}{ - 1(2x - 6)} = [/tex]
[tex] \frac{3x}{2x - 6} + \frac{ - 9}{2x - 6} = \frac{3x - 9}{2x - 6} = [/tex]
[tex] \frac{3(x - 3)}{2(x - 3)} = \frac{3}{2} [/tex]
a = -1, b = -9, c = 9, d = 3, e = 3,
f = 2, g = 3/2
Is (-4,- 4) a solution of y > -6x – 1 ?
Choose 1 answer:
Answer:
No
Step-by-step explanation:
I got it right
The point (-4, -4) does not satisfy the inequality y > -6x – 1, therefore it is not a solution to the inequation.
Explanation:To determine whether the point (-4, -4) is a solution to the inequality y > -6x – 1, we need to substitute the points into the inequality and see if they satisfy it.
We replace y with -4 and x with -4 in the given inequality:
-4 > -6*(-4) -1
-4 > 24 - 1
-4 > 23
As we observe, the inequality is not satisfied. Thus, the point (-4, -4) is not a solution of the inequality y > -6x – 1.
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