Answer:
A. x^2+6x-15
Step-by-step explanation:
(3x^2+2x-8)-(2x^2-4x+7) distribute the negative sign
3x^2+2x-8-2x^2+4x-7 combine like terms and simplify leaves us with the answer;
x^2+6x-15
Answer: 
Step-by-step explanation:
It is important to remember that the formula for calculate the area of a square is:

Where "s" is the side lenght of the square.
From the figure you can identify that the side lenght of the square can be represented with this expression:

Therefore, the following expression represents the area of the square:

In order to simplify it, you need to remember that:

Then, you get that the polynomial that represents the area of the given square, is:

Answer:
0.63repeating
Step-by-step explanation:
the 3 is repeating
Answer:
hhhhhhhhhhggggggggggggggggggggggggggggggggggghghg
Step-by-step explanation:
hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
Answer:
D.
69 feet
Step-by-step explanation:
Substitute 1 into the function for t and solve.
h( 1 ) = −16 ( 1 ) 2 +70( 1 )+15 h( 1 ) = 69h left parenthesis 1 right parenthesis equals negative 16 left parenthesis 1 right parenthesis squared plus 70 left parenthesis 1 right parenthesis plus 15 line break h left parenthesis 1 right parenthesis equals 69