Question

Please help me images attached

Answer 1

For number 4: plug 3 in wherever you see a t in the equation and solve.
h=-16(3)^2+60(3)+6........... Final answer: 42 feet

5: Get the x^2 by itself by adding 121 to both sides. You should get x^2=121. Take the square root of both sides to get ......................x=11 or -11, so the third option.

6. To factor, you need to find two numbers that multiply to 7 and add to 8
These numbers are 1 and 7. In factored form, you now have (x+1)(x+7)
Set both sides equal to zero and solve: x+1=0, .....so x=-1 x+7=0, so x=-7

7. Same process as number 6. should get -6 and 4 as answers.

Answer 2

1.
answer b (1,3) (second choice)

2.
maximum (first choice)

3.
answer is 3 seconds (first choice)

4.
if t = 3 seconds then height will be 42 feet

answer is 42 feet (third choice)

5.
x - 121 = 0
answer x = +-11 (last choice)

6. m^2 + 8m + 7 = 0
(m +7)(m+1) = 0

m = -7 and m = -1
answer is -7, -1 (third choice)

7. n^2 + 2n - 24 = 0
(n + 6)(n-4) = 0
n = 4 and n = -6

answer is -6, 4 (third choice)

8.
x = width
length = 3x - 1
x(3x-1) = 30
3x^2 - x - 30 = 0
(3x-10)(x+3) = 0
x = 10/3
answer width = 3.33 (first choice)