Answer:
-25
Step-by-step explanation:
You must first pick two points. I picked the points of (4, 400) and (8, 300). You can pick different points and still get the right answer.
Subtract the y's and the x's. Divide the difference of y by the difference of x.
400 - 300 = 100
4 - 8 = -4
100/-4 = -25
The slope, or rate of change, is -25.
Answer:
x = 4
Step-by-step explanation:
To solve, simplify the expression then use inverse operations to isolate x.

You have to divide , first you have to turn 28 into a fraction , 28 over one , then you have to flip 3/4 into 4/3 then multiply it
30÷5=6
4×5=20
for every 30 green lights there are 20 white lights