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OpenStudy (anonymous):
Need help please? I'm bad at math! Evaluate 4a+7b+3a-2b for a=5 and b=-3 ?
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OpenStudy (midhun.madhu1987):
First combine all like terms... then plug in the values of a and b...
OpenStudy (anonymous):
20?....
OpenStudy (midhun.madhu1987):
which are the like terms here?
OpenStudy (anonymous):
4a 3a 7b 2b?
OpenStudy (anonymous):
???????????????????????
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OpenStudy (midhun.madhu1987):
4a and 3a , 7b and 2b are like terms..combine them .. what u get?
OpenStudy (anonymous):
16?
OpenStudy (anonymous):
7a and 9b
OpenStudy (midhun.madhu1987):
yes... now plug in the values of and b
OpenStudy (midhun.madhu1987):
7a + 9b
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OpenStudy (anonymous):
32?
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