Step-by-step explanation:
y=mx+b (m is the slope, b is the y-intercept)
To come with sope choose two points from the graph (6,20), (4,30)
Then
m=(Y2-Y1)/(X2-X1) =(4-6)/(30-20)=-1/5
b= 50 (y-intercept)
SO y=-1/5x-50
I hope this helps
Answer: 
Step-by-step explanation:




Answer:
384
Step-by-step explanation:
multiply all those numbers together
Answer:
100 boards
Step-by-step explanation:
Step one:
Given data
We are told that Cynthia was paid 20 cents per board for painting the fence
that is for 1 board painted she gets $0.2
If she was paid $10
let us find the number of boards she painted for $10
= 10/0.2
=50 boards
This means that the total boards were 50*2= 100 boards
Answer:
40 mph
Step-by-step explanation:
To find the maximum speed at which the car can travel, as the distance it requires to stop is 168 feet, we just need to use the value of d = 168 in the equation, and then find the value of s:
168 = 0.05s^2 + 2.2s
0.05s^2 + 2.2s - 168 = 0
Using Bhaskara's formula: we have:
Delta = 2.2^2 + 4*0.05*168 = 38.44
sqrt(Delta) = 6.2
s1 = (-2.2 + 6.2)/0.1 = 40 mph
s2 = (-2.2 - 6.2)/0.1 = -84 mph (a negative value does not make sense as 's' is the speed of the car)
So the maximum speed of the car is 40 mph