Someone?? Can you help me with this?? Determine the number of roots of each polynomial equation.

1. x⁶+8x⁴-4x+10=0

2. (x+9) (x-9) (x+9) (x-9)=0

3. 5x⁴(x-7)(x²+8)²=0

4. -9x⁷+10x-7=0

5. 8x⁴-6x-9x³=0

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

What is the range for 31,39,29,34,37,24,36,33,34,28