Question

Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).

Answer 1

If $y=3x^2+30x+71$, then 
$y=3(x^2+10x)+71=3(x^2+2\cdot5x+25-25)+71$
$y=3((x+5)^2-25)+71=3(x+5)^2-75+71=3(x+5)^2-4$. So, in the first gap you can write 5 and in the second you can write -4.
Since $(x+5)^2\ge 0$, the minimum value of y is when $(x+5)^2=0$. The solution of the last equation is x=-5 and then y=-4 -- these are numbers, which you can write in the third and fourth gaps.

Answer 2

Answer:

Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.

If a submarine dives 378 feet in 14 seconds, the average change in elevation is

27

feet per second.

Step-by-step explanation:

FOR PLATO TYPE "27"