$\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\ \cline{1-1} A=452\frac{4}{7} \end{cases}\implies 452\frac{4}{7}=\pi r^2\implies \cfrac{3168}{7}=\pi r^2 \implies \cfrac{3168}{7\pi }=r^2 \\\\\\ \stackrel{\pi =\frac{22}{7}}{\cfrac{3168}{7\cdot \frac{22}{7}}}=r^2\implies \cfrac{3168}{22}=r^2\implies 144=r^2\implies \sqrt{144}=r\implies 12=r \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill \stackrel{diameter=2r}{d=24}~\hfill$

6 0

2 years ago

In a cafeteria, there are the same number of 3-legged stools as there are of 4-legged chairs. If stools have 120 fewer legs than

olga_2 [115]

Imagine what x is quantity of stools. So
3x+120=4x
x=120
120 stools in cafeteria
120 chairs in cafeteria
120+120=240
There 240 people can sit in this cafeteria

6 0

3 years ago

Guys please help me out I hate gradpoint so much

Artist 52 [7]

Answer:

1 + 1 - 1 + 1 - 0 x 0

8 0

2 years ago

Read 2 more answers

How do you simplify <br> -5(a-6) + 2a

Vilka [71]

Easy, take your problem,

-5(a-6)+2a

Multiply the 5.

-5a+30+2a

Then just add apples and oranges.

-5a+2a= -3a.

Making your equation -3a+30.