Question

Find the range of the quadratic function.

f(x) = (x + 8)2 - 7

A. [-7, ∞)

B. (-∞, -8]

C. [-8, ∞)

D. (-∞, -7]

Answer 1

its A right?

Answer 2

are u sure that's a quadratic...?

Answer 3

thats the question i received in my quiz

Answer 4

\[f(x) = (x+8)^{2} -7\]
is this ur equation?

Answer 5

yep

Answer 6

ok then, we can work with that
just a heads up though, you can indicate a power by using the ^ symbol, usually located around the 6 on the keyboard

Answer 7

the anwer is A
See , the square on the bracket will always give us a positive ,so the least
number you can have in the range is -7
whateve number you add (i.e x=all numbers)
range[-7,infn)

Answer 8

http://prntscr.com/15hgfi

Answer 9

is it C

Answer 10

a, your y intercept is +1

Answer 11

so A

Answer 12

yep, A

Answer 13

You have 332 feet of fencing to enclose a rectangular region. What is the maximum area?

A. 6889 square feet

B. 6885 square feet

C. 110,224 square feet

D. 27,556 square feet

Answer 14

yep, sure

Answer 15

i calculate it and got A as my answer

Answer 16

how did u calculate it?

Answer 17

P= 2(l+b)

Answer 18

using the A=lb

Answer 19

2L + 2W = 332
and L x W = y
so from eqn 1, L = 332/2 + W
so (332/2 + W) x W = y
166W + W^2 = y
when derivative of y = 0 = maximum area
y' = 2W + 166
0 = 2W +166
-166 = 2W
W = 83

therefore as 2L +2W =332 and w = 83, L must =83 also
so L x W =A
83 x 83 = 6889

A