4 white cars.
4x9=36
36 + the 4 white cars = 40
Lines B and C are perpendicular ⇒ answer C
Step-by-step explanation:
The product of the slopes of the perpendicular line is -1
The slopes of the parallel lines are equal
The slopes of two lines are
and ![m_{2}](https://tex.z-dn.net/?f=m_%7B2%7D)
1. If
×
= -1, then the two lines are perpendicular
2. If
=
, the the two lines are parallel
The equation of a line in slope-intercept form is y = m x + c, where m is
the slope of the line
Line A: y =
x + 2
The slope of the line is
= ![\frac{1}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D)
Line B: y =
x + 7
The slope of the line is
= ![-\frac{1}{2}](https://tex.z-dn.net/?f=-%5Cfrac%7B1%7D%7B2%7D)
Line C: y = 2 x + 4
The slope of the line is
= 2
Line D:
x + ![\frac{5}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B5%7D%7B4%7D)
The slope of the line is
= ![\frac{1}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D)
∵
= ![-\frac{1}{2}](https://tex.z-dn.net/?f=-%5Cfrac%7B1%7D%7B2%7D)
∵
= 2
∵
× 2 = -1
∴ Line B and Line C are perpendicular because the product of their
slopes is -1
Lines B and C are perpendicular
Learn more:
You can learn more about slope in brainly.com/question/4152194
#LearnwithBrainly
5x10+15-40(50)+40+10+24
50+15-40(50)+40+10+24
65-40=25+50=75+40=110+10=120+24=144
144 is your answer