Write a point slope form equation and slope intercept equation. passes through (-1,-6), slope= -4

The point-slope form would be y + 6 = -4(x + 1) and the slope-intercept form would be y = -4x - 10

Step-by-step explanation:

In order to find the point-slope form, you simply need to put the point and the slope into the base form.

y - y1 = m(x - x1)

y - -6 = -4(x - -1)

y + 6 = -4(x + 1)

Now to find the slope-intercept, simply solve for y.

y + 6 = -4(x + 1)

y + 6 = -4x - 4

y = -4x - 10

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240