Question

Evaluate the expression for the given quantity. -9.8t + 20t + 8 for t = -2, 0, 3.5

Answer 1

Replace the variable t with −

2

in the expression. 3.5

Explanation:

-9.8t+20t+8t=-2,0,3.5

-9.8t+20t+8t=-2 18.2t=-2

=03.5 18.2=t-2

Answer 2

-12.4, 8 and 43.7.

Explanation:

The given expression is

`-9.8t+20t+8`

And we have to evaluate it for
`t=-2`,
`t=0` and
`t=3.5`.

To evaluate we just need to replace each t-value into the polynomial.

For
`t=-2`, we have

`-9.8t+20t+8=-9.8(-2)+20(-2)+8=19.6-40+8=-12.4`

For
`t=0`, we have

`-9.8t+20t+8=-9.8(0)+20(0)+8=0+0+8=8`

For
`t=3.5` we have

`-9.8t+20t+8=-9.8(3.5)+20(3.5)+8=-34.3+70+8=43.7`

Therefore, the result for each t-value is, respectively, is -12.4, 8 and 43.7.