Using the given equation h=-t^2+8t solve.

Step-by-step explanation:

hello :

h(t) = -t²+8t

the highest point is the vertex of this prabola (-b/2a ; h(t) )

a= -1  and   b= 8     -b/2a = - (8)/2(-1) = 4

h(4) = -(4)²+8(4) = -16+32 = 16

first answer : 16

second answer : 4

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x