It's simple, if you understand. Let's see.
y= the total cost of everything.
x=the total amount of hours spent on the contract.
It's simple!!
$140 is the base line. It never changes. So, we begin with $140. Every hour Luigi works, he charges $25. So $140+$25x. Finally, our total amount is y, so $140+$25x=y. abracadabra!!
The answer is 216 miles. 1.5 hours is 90 minutes. Multiply 2.4 times 90.
Answer:
b. (2, 5, 3)
Step-by-step explanation:
Trying the offered choices seems the fastest way to find the answer. The second choice works in all equations, hence is the solution.
Another strategy you can use is to see if the equations are dependent. Here, it looks like adding twice the third equation to the other two eliminates at least the x- and y-variables. If that eliminates z, then there are infinite solutions. Instead, it gives the equation ...
7z = 21
z = 3 . . . . . divide by 7
This answer is consistent with choice B, confirming that answer and eliminating the other choices.
Answer: Yes, 
<u>Step-by-step explanation:</u>
f(x) = 3x - 6 is a line so it is a function because
it passes the vertical line test
and the horizontal line test
To find the inverse, swap the x's and y's and solve for y
