4. hue is planning to run in a marathon to support her favorite charity. for each description, write both an equation and a related equation that could be used to solve the problem. then solve the problem. (a) hue's sponsor plans to give $20 to her favorite charity for each mile she runs. how many miles would hue need to run if she wants to earn $300 for her favorite charity? (b) hue predicts that she may only be able to run 10 mi. she still wants to earn $300 for her favorite charity. how much money should she ask her sponsor to give her per mile in order to reach her goal? 99 points

A) 

let m = miles

300=20m

divide each side by 20 to find m
 
300/20 = 15 miles

B)

let d = dollar amount per mile
like the first one just use 10 instead of 20

300 = 10d

divide both sides by 10 to find d

300/10 = 30 dollars per mile

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.