Answer:
-3x-3 or -3(x+1)
Step-by-step explanation:
7-5x+2(x-5)
7-5x+2x-10
7-3x-10
-3x+7-10
-3x-3
Answer:
Step-by-step explanation:
(a)
perfect positive correlation.
As x increases by 1, y increases by 1
y is 1 times x
equation: y = x
(b)
perfect negative correlation.
As x increases by 1, y decreases by -4
y is times x
equation: y = -4x
You could wash 75 cars at this rate because 45/3 equals 15. You would multiply 5 by 15 and get 75.
Answer:
Step-by-step explanation:
If two variables are directly proportional, it means that an increase in the value of one variable would cause a corresponding increase in the other variable. Also, a decrease in the value of one variable would cause a corresponding decrease in the other variable.
Given that x varies directly with y, if we introduce a constant of proportionality, k, the expression becomes
x = ky
If x = - 4 when y = 6, then
- 4 = 6k
k = - 4/6 = - 2/3
Therefore, the equation that relates x and y is
x = -2y/3