С = 2πr [π≈3.14]
220 = 2 * 3.14 * r
220 = 6.28r
r = 220/6.28 ≈ 35 cm ← <span>to the nearest whole number.</span>
Hello.
Firstly, let's isolate x on the equation:

Now, we can replace 'x' for 'y' and vice-versa:

Hope I helped.
Answer:

Step-by-step explanation:
Let's do it part by part:
<u>Twice "a":</u>
This means 2 times a, or 2*a
<u>Cube of "a":</u>
This means a cubed, so a to the power 3, or 
Also note "is" means "equal" and "of" means "multiplication.
Twice a increased by cube of a means both parts are summed so we have:
\
This is the formula/equation
Answer:
296
Step-by-step explanation:
There are 5 days where the fee was $37 and 2 days where the fee was $42
so simply multiply the given values by the number of days used.
(37*5)+(42*2)
185+84
296
42 - -84=-42
Hope this helps :)