We have learned that, in in an algebraic expression<span>, letters can stand for numbers. When we substitute a specific </span>value<span> for each variable, and then perform the operations, it's </span>called<span> evaluating the </span>expression<span>. Let's evaluate the </span>expression<span> 3y + 2y when 5 = y.</span>
Less than: 3/8, 1/2
The same: 8/12
Greater than: 4/5, 6/6, 9/10
(I think this is what the question was? you typed it in a very jumbled fashion)
Answer: The correct answer is: [B]:
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"
" .
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Step-by-step explanation:
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Note: A number; "divided by a variable" ; is Not a "polynomial" .
Answer choice: [B]: "
" ;
is a "number; divided by a "variable" ; and as such, is Not a "polynomial".
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Answer is A) -64m^3 -60n^2
Step 1:
Line up respective variables in column.
.................(1)
.................................(2)
Step 2:
We need to multiply first equation with -2 so that the coefficient of b becomes equal and opposite of -8.
*2
...................(3)
Step 3:
Add equation (2) and (3)

The b terms will cancel out and we are left with only a terms.
-11a = 22
dividing both sides by -11
a=-2
Step 4:
plug this value of a in equation (1) to find value of b,



b=-9
Answer : a=-2 and b =-9