Answer:
b = 10
Step-by-step explanation:
The area (A) of a triangle is calculated as
A =
bh ( b is the base and h the height )
Here h = 3x + 15 and A = 15x + 75, thus
× b × (3x + 15) = 15x + 75
Multiply both sides by 2 to clear the fraction
b(3x + 15) = 30x + 150
Divide both sides by (3x + 15)
b =
← factor numerator and denominator
=
← cancel the factor (x + 5) on numerator/denominator
= 
= 10
I think the answer to this is a rate
1. I have 5 times some number of shoes. I give 10 away and now have 40. How many shoes did I originally start with?
2. I have 3 times some number of apples. I get 4 more apples. What amount of apples did I originally<span> start with? </span>
Answer:
b, 2,-4
Step-by-step explanation:
its the only one that seems to be correct