Answer:
and


Step-by-step explanation:
Let the variables be: x and y
The equations can be modelled as:
and

To solve for x and y, we have:
Make x the subject in 

Substitute
in 


Collect like terms


Divide both sides by 2

Substitute
in 


So, we have:

Answer:
5 inches wider
Step-by-step explanation:
The given area expression factors as ...
x² +2x -15 = (x -3)(x +5)
Apparently, we're to assume that these factors represent length times width, and the factor x-3 corresponds to a length that is 3 inches shorter than the old length (x). Then the width is (x+5), which is 5 inches wider than the old length.
1. 5×10×7= 350
2. 12×6×8=576
3. 4.2×3.5×2=29.4
4. 1.1×1.5×2.6=4.29
5.4×3×5= 60
6. 4.1×2.6×5.1=47.97
Whata re the answers that i can oick from