Answer:
The right answer is, A. 2.5
Step-by-step explanation:
if we have to,
p = 15
b = 5
We need to find the value of "a". then we replace in the formula the values that we have
p = 2 (a + b)
15 = 2 (a + 5)
15 = 2a + 10
15-10 = 2a
5 = 2a
[tex]\frac{5}{2}[/tex] = a
2.5 = a
therefore the value of a = 2.5
