Question

The perimeter of an isosceles triangle is p = 2a + b. Find the numerical value of a if p = 10 and b = 3. A. 61/2 B. 13 C. 31/2 D. 7

Answer 1

D. a = 3 1/2

Explanation:

Plug in values

10 = 2a +3

Subtract 3 from both sides

7 = 2a

Divide both sides by 2

3 1/2 = a

Answer 2

Answer:
`3(1)/(2)`

Explanation:

Here the given expression,

2a + b = p

By putting p = 10 and b = 3 in the above expression,

We get,

`2a + 3 = 10`

`\implies 2a = 10 - 3`

`\implies 2a = 7`

`\implies a = (7)/(2) = 3(1)/(2)`

Hence, Option C is correct.