15. -6b+2-5b=36+6b
-11b+2=36+6b
-17b+2=36
-17b=34
b=-2
16. 48+32h=-39+3h
48+29h=-39
29h=-87
h=-3
17. -20r+5=-20r+20
5¥20
no solution
18. a+7=7a+21+18-6a
a+7=a+39
7¥39
no solution
19. -8b+24=24-24b
16b+24=24
16b=0
b=0
20. 5a+4=5a-10
4¥-10
no solution
Answer:
25
Step-by-step explanation:
An average 6th grader weight 80 pounds and 2000/80 is 25
we know that
A quadratic equation is a polynomial with an order of two. Its general form is

case a) 

<u>The case a) is a quadratic equation</u>
case b) 
<u>The case b) is a grade
polynomial</u>
case c) 
<u>The case c) is a grade
polynomial</u>
case d) 
<u>The case d) is a grade
polynomial</u>
therefore
the answer is

Answer:
x=2 y=6
Step-by-step explanation:
D.) 14
Because it’s going up four every time