A test consists of multiple choice questions worth 4 points and essay questions worth 8 points. The test has 22 questions that are worth a total of 100 points. Use a model to determine how many multiple choice questions are on the test.

Question

anonymous · Answer

The answer choices are:  
 14

 16

 19

 22

anonymous · Answer

What I got was x = 10 and y = 12. But I guess thats wrong.

dumbcow · Answer

m+e = 22
4m + 8e = 100
use substitution
e=22-m
->4m + 8(22-m) = 100
-4m = -76
m = 19

anonymous · Answer

simultaneous eqns , all it is

anonymous · Answer

so this is wrong? 

m + e = 22

4m + 8e = 100

m = 10, e = 12

anonymous · Answer

obviously its wrong

anonymous · Answer

:/

anonymous · Answer

sub them in, doesnt satisfy second eqn

anonymous · Answer

ah! I mean. m = 15, e = 5. I don't know where I got 10 and 12 from. ._.

anonymous · Answer

nvm
doesn't work for first equation. JEEZ.

anonymous · Answer

Thanks for the help. I really do appreciate it. ;D