I'm going with the 3rd one ...
hope I helped !
Answer:
-18
Step-by-step explanation:
Left Hand Side = -2(7a + 9b) = -14a - 18b
Comparing it with Right Hand Side, ? = -18
Answer: A.parallel
When graphed both have the same slope and never intersect or touch at any point.
The first thing we must do for this case is to define variables.
We have then:
x = Multiple-choice questions
y = short-answer questions
We write the following system of equations:
2x + 4y = 80
x + y = 25
Solving the system of equations we have:
x = 10
y = 15
Answer:
there are 10 multiple-choice questions
