Atest has thirty questions worth 100 points. the test consists of true/false questions worth 3 points each and multiple choice questions worth 8 points each. how many multiple choice questions are on the test?

2 multiple choice problems

Step-by-step explanation:

the equations will be...

x=true/false questions

y=multiple choice problems

x+y=30

3x+8y=100

5y=10

y=2

So let's break this question down.
You need a bit of both, right? Well we need to calculate how many multiple choices we can do whilst having true/false questions, and not going over or under on points.

So, let's pick a random number, 5. So let's do 8x5, that equals 40.

Ok so now we have our number, 5 multiple choice questions. 
The true/false questions should be easy, just do 3x20 and you get 60.

ANSWER: 5