$f(x) = -16x^2+ 64x + 80\\\\f(x) = -16(x^2- 4x) + 80\\\\f(x) = -16(\underline {x^2-2\cdot2x\cdot2+2^2}-2^2) + 80\\\\f(x) = -16\big[(x-2)^2-4\big] + 80\\\\f(x) = -16(x-2)^2+64 + 80\\\\\bold{f(x)=-16(x-2)^2+124\quad\implies\quad h=2\,,\quad k=124}$

<u>The vertex is </u><u>(2, 124)</u>

7 0

3 years ago

One eight of Tony's books are mystery books. He has 3 mystery books. How many books does tony have in all?

Leviafan [203]

Tony has 24 books in total because if 1/8 of the books are mystery and there are 8 mystery books you have to multiple the denominator by the amount of mystery books (8*3=24).

8 0

3 years ago

Solve for the indicated variable.<br> a -c=d-r. for a<br> a=

sveticcg [70]

Answer:

a= d-r +c

Step-by-step explanation:

a-c = d-r

a= d-r +c

6 0

3 years ago

Xavier is designing a display for a bulletin board that is 3.5 feet wide.He wants to place a 14-inch-wide poster in the center o

My name is Ann [436]

There would be 14 inches on both sides.

{[(3 * 12) + 6 ] -14} ÷ 2
{[ 36 + 6 ] - 14 } ÷2
{ 42 - 14 } ÷2
28 ÷2
14

8 0

3 years ago