Andy solves problems 74 to 125 inclusive in a math exercise. how many problems does he solve?
a. 53
b. 52
c. 51
d. 50
e. 49

Well in order to find out how many problems Andy has solved you would have to do the last number he solved minus the first number he solved. So 125-74=51 or C. And was this a trick question? Youre in high school...im in middle school

line1:y=2x+3

Gradient1=2

Let line2 be the line passes through (-4,1)and perpendicular to line1.

Because line2 and line1 are perpendicular, (gradient of line2) (gradient of line1) =-1

Gradient of line2=-1/2

Equation of line2:y-y1 =m(x-x1)

:y-1 =(-1/2)[x-(-4)]

:(y-1)(-2)=(x+4)

:-2y+2 =x+4

:-2y+2-x-4=0

:-x-2y-2 =0

:x+2y+2 =0

*notes:gradient=m