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# help

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494
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The width, length, and height of a rectangular prism are each increased by 10% . What is the percent increase in the volume of the prism? Express your answer to the nearest whole number.

Nov 10, 2017

### Best Answer

#3
+1

1. Find the Slope

Finding the slope is relatively simple once you remember the formula. For me, I could not memorize any formulas unless I put them in words. I remember this formula as the ratio of the difference in y-values to x-values, if that helps. Anyway, here is the formula.

$$m=\frac{y_2-y_1}{x_2-x_1}$$

 $$m=\frac{y_2-y_1}{x_2-x_1}$$ Now, plug in the coordinates into their respective positions in the formula. $$m=\frac{5+16}{4+3}$$ Simplify the value of the slope completely. $$m=\frac{21}{7}=3$$

Now that the slope has been determined, one can move on to the next step.

2. Plug in a Coordinate for X and Y to Solve for B.

We now know the slope, so the equation of the line is now $$y=3x+b$$. Based on the given info, we know that both Cartesian coordinates, (-3,-16) and (4,5) lie on this line. Substitute one point in its place for x and for y to findt he answer.

 $$y=3x+b$$ I will substitute the second point, $$(\textcolor{red}{4},\textcolor{blue}{5})$$ in the equation. It does not matter which point one chooses to substitute in. $$\textcolor{blue}{5}=3*\textcolor{red}{4}+b$$ Notice how the substitution replaces the coordinate. Now, solve for b. $$5=12+b$$ Subtract 12 from both sides to isolate b. $$b=-7$$

3. Write the Final Equation

Now that the only two necessary items, m and b, have been solved for, write the equation in y=mx+b format.

m=3

b=-7

$$y=3x-7$$

You are done now!

Nov 11, 2017

### 3+0 Answers

#1
+2

V =W x H x L

V =1.1 x 1.1 x 1.1

V =1.331 - 1 x 100 =33.1%=~33%. No matter what dimensions you choose for W, H, L, if you increase them ALL by 10%, the increase in volume will always be 33.1%.

Nov 10, 2017
#2
0

Find the equation of the line passing through the points (-3, -16) and (4,5). Enter your answer in "y=mx+b" form.

Nov 10, 2017
#3
+1
Best Answer

1. Find the Slope

Finding the slope is relatively simple once you remember the formula. For me, I could not memorize any formulas unless I put them in words. I remember this formula as the ratio of the difference in y-values to x-values, if that helps. Anyway, here is the formula.

$$m=\frac{y_2-y_1}{x_2-x_1}$$

 $$m=\frac{y_2-y_1}{x_2-x_1}$$ Now, plug in the coordinates into their respective positions in the formula. $$m=\frac{5+16}{4+3}$$ Simplify the value of the slope completely. $$m=\frac{21}{7}=3$$

Now that the slope has been determined, one can move on to the next step.

2. Plug in a Coordinate for X and Y to Solve for B.

We now know the slope, so the equation of the line is now $$y=3x+b$$. Based on the given info, we know that both Cartesian coordinates, (-3,-16) and (4,5) lie on this line. Substitute one point in its place for x and for y to findt he answer.

 $$y=3x+b$$ I will substitute the second point, $$(\textcolor{red}{4},\textcolor{blue}{5})$$ in the equation. It does not matter which point one chooses to substitute in. $$\textcolor{blue}{5}=3*\textcolor{red}{4}+b$$ Notice how the substitution replaces the coordinate. Now, solve for b. $$5=12+b$$ Subtract 12 from both sides to isolate b. $$b=-7$$

3. Write the Final Equation

Now that the only two necessary items, m and b, have been solved for, write the equation in y=mx+b format.

m=3

b=-7

$$y=3x-7$$

You are done now!

TheXSquaredFactor Nov 11, 2017