Answer:
Step-by-step explanation:
This is a linear equation of the form y = mx + b, where m is the rate of change and b is the y-intercept, also known as the value of y when x = 0. Our independent variable is the number of miles we travel, and we will call that x. If we pay .20 per mile, and miles is "x", we represent that as .20x. The 70 is the amount we will pay per day even if we drive 0 miles. Therefore, the equation is:
y = .20x + 70.
I cannot graph this for you here.
We can choose a number of miles, say 100, and solve for our cost:
y = .20(100) + 70
y = 20 + 70
y = 90
We can expect to pay $90 if we drive 100 miles in a day.
Answer:
y = 
Step-by-step explanation:
Given y varies directly as x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition
x = 3 when y = 7
k = 
= 
, thus
y = x ← equation of variation
When x = 7, then
y = × 7 =
Answer:
3.No 4.Yes 5.Yes
Step-by-step explanation:
Answer:
7
Step-by-step explanation:
ab - cd = ?
Put the numbers into the correct variables of the equation.
(5)(3) - (4)(2) = ?
Now multiply 5 and 3 with each other. This leaves you with:
15 - (4)(2) = ?
Now, multiply 4 and 2 with each other. This leaves you with:
15 - 8 = ?
Now, you are able to solve the equation.
15 - 8 = 7
