To get the vertex of the parabola we proceed as follows;
y=-7(x-4)^2-5
The above can be written as:
y=-7x^2+56x-117
The values of a,b and c are:
a=-7, b=56 and c=-117
x=-b/(2a)
x=-56/(-7*2)=4
but;
y=-7x^2+56x-117
y=-7(4)^2+56(4)-117
y=-5
Thus;
x=4 and y=-5
The vertex will be at point (4,-5)

7 0

3 years ago

Read 2 more answers

Find the x-intercept and the y-intercept of the line above

Liono4ka [1.6K]

Answer:

(a): x-intercept: -4

(b): y-intercept: -1

Step-by-step explanation:

5 0

3 years ago

Estimate the answear by rounding each number to its greatest place: 199 x 91

Nataly [62]

I estimated the answer to be 18,000

Without estimation the answer would be 18,109

3 0

3 years ago

Read 2 more answers

Can someone help me, please thanks

Ilya [14]

I believe that the answer is 1845

the surface area of the cube is 1350

the surface area of the pyramid is 495

the total surface area is :
$1350 + 495 = 1845$

good luck

3 0

4 years ago