Question

Using the formula P = 2(a + b), find a when P = 15 and b = 5. a 2.5 b 5 c 8 d 10

Answer 1

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

$\frac{5}{2}$ = a

2.5 = a

therefore the value of a = 2.5

Answer 2

Answer:

the correct answer is a.2.5

Step-by-step explanation: