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Anika [276]
2 years ago
10

An exam worth 145 points contains 50 questions. Some of the questions are worth two points and some are worth five points. How m

any two point questions are on the test? How many five point questions are on the test?
Mathematics
1 answer:
MatroZZZ [7]2 years ago
3 0
A*5+b*2=145     
a    +b   =50       | * -2

5a   +2b=145
-2a  -2b = -100
----------------------
5a-2a    = 145-100
3a=  45
a=45:3
a=15 questions are worth 5 p
b=50-15=35 questions worth 2 p

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