We have been given that Mrs. Chen's students are making and decorating gift boxes for a nursing home. The boxes are 7 inches wide, 7 inches long, and 7 inches high. We are asked to find the amount of cardboard that is needed for each box.

We will use surface area of cuboid formula to solve our given problem.

$SA=2(lw+lh+hw)$ , where,

l = Length,

w = Width,

h = Height

$SA=2(7\text{ in}\cdot7\text{ in} +7\text{ in}\cdot7\text{ in}+7\text{ in}\cdot7\text{ in})$

$SA=2(14\text{ in}^2+14\text{ in}^2+14\text{ in}^2)$

$SA=2(42\text{ in}^2)$

$SA=84\text{ in}^2$

Therefore, Mrs Chen needs 84 square inches of cardboard.

3 0

3 years ago

If f(x) = 4x – 6, what is f(6)?

chubhunter [2.5K]

18 is the answer you're welcome

8 0

4 years ago

Read 2 more answers

Six more than four times a number is -26

bearhunter [10]

4x + 6 = -26

I'm not sure if your supposed to solve, but I will anyways :)

4x + 6 = -26
-6 -6
4x = -32
x = -8

Hope this helps!

5 0

3 years ago

How is this solved?<br><img src="https://tex.z-dn.net/?f=%20f%7Bx%7D%20%3D%20%5Cfrac%7B2x%20%2B%201%7D%7Bx%20%2B%201%3F%7D%20" i

bekas [8.4K]

$\bf f(x)=\cfrac{2x+1}{x+1}\implies \stackrel{f(x)}{0.3}=\cfrac{2x+1}{x+1}\implies 0.3(x+1)=2x+1
\\\\\\
0.3x+0.3=2x+1\implies 0.3x-2x=1-0.3\implies 0.3x-2x=0.7
\\\\\\
-1.7x=0.7\implies x=\cfrac{0.7}{-1.7}\implies x\approx -0.41176470588235294$

7 0

3 years ago