-6+3=-3
-6-3=-9
so -3 and -9
We can generalise this by finding the equation of the line.
The gradient is: 15
We can take when x = 10, and y = 150 to find the equation of the line.
y - 150 = 15(x - 10)
y - 150 = 15x - 150
y = 15x
Thus, when x = 80, y = $1200 (ie B)
Area of a cylinder is the area of the top + the area of the bottom + the area of the wrap-around (lateral)
top: pi*r*r=81pi
bottom: 81pi
lateral: 2pi*r*h=18pi*h, h is unknown, but you don't have to solve it.
add them up: 81pi +81pi + 18h*pi=1850
pi*h=(1850-162pi)/18, (plug this in the volume formula below.)
volume of a cylinder: the area of the base × the height =81pi*h
volume=81[1850-162pi)/18]
use your calculator: V=6036
please double check my calculation by yourself.
D. $1.00 each is the answer
Answer:
7
Step-by-step explanation:
y = 60x + 150
550 - 150 = 400
400/60 = 6.66666...
Round up as you can't sell just part of the car.
He must sell 7 cars
