Please help i will give brainliest...
I need in form of y=mx+b Thank you!

y = -2x + 3

Step-by-step explanation:

Let equation of the line be y = mx + b

Since the line is perpendicular to y = 1/2x - 10,

product of the gradient of both lines = -1

therefore,

1/2 x m = -1

m = -2

since it passes through (4, -5),

sub (4, -5):

-5 = -2(4) + b

b = 3

therefore, equation of the line is y = -2x + 3

b. 18

step-by-step explanation:

so the equation for this is:

ab^2=ac⋅ad

ab being the top length of 6 and ac being the length of 2 and ad being the length of x. let's plug into the equation:

6^2 = 2x

now lets just solve for x:

36 = 2x

18 = x

i hope that !