Answer:
Step-by-step explanation:
Let,

Using the formula:

Answer:
-22
Step-by-step explanation:
The function y=400-22x is a linear equation in the form y=mx + b. Although they put "mx" after "b" so the equation doesn't start with a negative.
"m" is rate of change, or the slope if graphed.
The negative means "y" decreases as "x" increases. On a graph, it decreases left to right.
Answer:
4
Step-by-step explanation:
You call the number x. Then you do (x-7) * 3=-9.
3x-21=-9
3x=12
x=4
Answer:36 is this 2nd grade?
Step-by-step explanation:
f(5) = 0.5^(5-1)*f(1) = 0.5^4 * 120 = 7.5