Simplify the expression: 1. -0.8b^2+7.4b+(5.6b-0.2b^2)
2. (7.3y-y^2+4)+0.5y^2-(8.7y-2.4y^2) PLZ HELP
URGENT!

1. -b^2+13b

2. 1.9y^2-1.4y+4

Step-by-step explanation:

1. -0.8b^2+7.4b+(5.6b-0.2b^2)

Simplify: -0.8b^2+7.4b+5.6b-0.2b^2

Add like terms: (-0.8b^2-0.2b^2)= -1b^2/-b^2 (7.4b+5.6b)= 13b

-b^2+13b

2. (7.3y-y^2+4)+0.5y^2-(8.7y-2.4y^2)

Simplify: 7.3y-y^2+4+0.5y^2-8.7y+2.4y^2

Add like terms: (2.4y^2-y^2)= 1.9y^2 (7.3y-8.7y)= -1.4y (don't forget about the 4)

1.9y^2-1.4y+4

the solution is h=10 because you add 9 to each side of the equation.

42.4

step-by-step explanation:

convert to decimal