Question

Evaluate 3a + 6b when a = 5 and b = –2.4. A. 0.6 B. –0.6 C. –6.4 D. 6.6

Answer 1

Option A.

Explanation:

The given expression is

`3a+6b`

We need to find the value of given expression when a=5 and b=-2.4.

Substitute a=5 and b=-2.4 in the given expression.

`3(5)+6(-2.4)`

`15+(-14.4)`

It can be written as

`15-14.4`

`0.6`

Therefore, the value of given expression is 0.6 when a=5 and b=-2.4.

Answer 2

You plug it in 3(5) + 6(-2.4) = 15 + (-14.4) = 0.6.