Answer:
=12x+y
Step-by-step explanation:
Combine like terms
=5x+-3y+7x+4y
=(5x+7x)+(-3y+4y)
=12x+y
Answer:
55
Step-by-step explanation:
6m+90=96m
Answer:
Step-by-step explanation:
We know that for two similar matrices
and
exists an invertible matrix
for which
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∴ 
Also 
and 
∴
so, 
162 plants, if 60% of the plants live you can set it up like this: 60/100 = X/270, to find X, you cross multiply and divide by 100
15X=12X+12
Subtract 12X
3X=12
X=4