Answer:
10x+15
Step-by-step explanation:
area of the two rectangles combined is one big rectangle
area of rectange= base*height
base length: 2x+3
height: 5
(2x+3)*5
=(2x*5)+(3*5)
=10x+15
ANSWER

EXPLANATION
The first polynomial is

The second polynomial is

If we add the two polynomials we obtain,

Next we group like terms to obtain,

We simplify the to obtain,

This is the sum of the two polynomials in descending powers of

Descending means from the highest power to the least.
Answer:
D. the mean would go up by 0.9
Step-by-step explanation:
Add the first set together without the 17, you get 7.1
Add the second set together (so include the 17 this time) you will get 8
meaning the 7.1 went to 8 which is going uo by 0.9
Replace x and y in the equation with what they tell you x and y equal.
2(14) / 13 - 9(1/3)
Now simplify:
2 x 14 = 28
9 x 1/3 = 3
You now have:
28/13-3
Simplify again to het 28/10 this can be reduced to 14/5