The given operation involves just swapping the two rows, so carrying out

on the matrix gives
For this case we have the following polynomial:
7x2 + 68xy - 20y2
Factoring we have:
(7x-2y) (x + 10y)
We verify the factorization:
7x2 + 70xy - 2xy - 20y2
Rewriting we have:
7x2 + 68xy - 20y2
Therefore, the factorization is correct.
Answer:
A) (7x - 2y) (x + 10y)
Answer:
5.3 cups of flour
Step-by-step explanation:
8.5 - 3.2 = 5.3 cups of flour
ANSWER
C. x>5
EXPLANATION
The given inequality is:
3x + 3 − x + (−7) > 6
Deal with the parenthesis first to obtain;
3x + 3 − x −7 > 6
Group similar terms to get:
3x − x> 6-3+7
Combine similar terms to get,

Divide both sides by 2 to obtain:

The correct choice is C. x>5
Answer:
Mike is not right
Step-by-step explanation:
we know that
If two figures are similar, then the ratio of its surface areas is equal to the scale factor squared
Let
z----> the scale factor
x----> surface area of the enlarged rectangular prism
y-----> surface area of the original rectangular prism

so
In this problem we have

substitute



so
The surface area of the enlarged rectangular prism is 4 times the surface area of the original rectangular prism
therefore
Mike is not right
<em>Verify with an example</em>
we have a rectangular prism



The surface area of the prism is equal to

substitute the values

If he doubles each dimension of any rectangular prism
then
the new dimensions will be



The new surface area will be


therefore
The surface area of the enlarged rectangular prism is 4 times the surface area of the original rectangular prism