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

-12.4, 8 and 43.7.

Step-by-step explanation:

The given expression is

And we have to evaluate it for , and .

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

For , we have

For , we have

For we have

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

Hello! I believe the answer is he will sell 28 pairs of socks!
        Here's how I got it :
                    1.) Make a fraction out of what you know so far ! So we know that for every 8 pairs of shoes he sells, he sells 4 pairs of socks. We can put this as a fraction this way :  4/8 , with socks being the numerator and shoes being the denominator.
                     2.) Since we're trying to figure out how many pairs of socks he sold, and we know he sold 56 pairs of shoes, we can set the next fraction up like this :          x / 56, with x being the # of pairs of socks we don't know, and 56 being the # of pairs of shoes we do know!     
                     3.) Now, we can find how many pairs of socks he sold!
                          4/8 -->  x/56  . does that make sense?
                            56/8 is 7, so now multiply 4 by 7! That equals 28, which is your answer!