The cost of buying cameras is a linear function of the number of cameras bought. the cost of 2, 4, and 8 video cameras is shown in the table. identify the equation in slope-intercept form that represents the function.

Using the information in the table, divide the cost by the number of cameras:

200 / 2 cameras = 100 per camera

400 / 4 = 100 per camera.

You would need to multiply the number of cameras bought by 100 to get the total cost.

The equation would be y = 100x

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15