Eight algebra questions (explanations would be appreciated):

use substitution to solve the following:

1)
y=x²
y=x+2

2)
y=x²+3
y=4x

3)
x²+4y=1
y=x+1

4)
x²-3y=-2
y=4+x

5)
x²-2y=-4
y=6-x

6)
x²+4y=9
y=x-3

7)
x²+5y=16
y+x=2

8)
y=x²-6x
3x-y=-10

Subtract 8 1/6 - 4 5/6 . simplify the answer and write as a mixed number.

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.

Hormones perform important functions within the reproductive system. during puberty, a number of changes occur in the body. which hormone is responsible for the development of these characteristics in the female? estrogen progestin progesterone testosterone