M8 Weekly Review 18

A water tank is losing water each minute and is represented by the function,

 $f\left(x\right)=600-15x$  , where f(x) is the number of gallons of water left in tank after x minutes.

What is the average rate of change from 3 to 6 minutes?

• -45 gallons per minute

• -85 gallons per minute

• -15 gallons per minute

• -90 gallons per minute

Find the y-intercept

• -3
• 12
• 16
• 2

Find the slope of the line.

• Undefined
• 0
• 1
• -1

According to exponent rules, when we raise the power to a power we _______ the exponents.
Example: (d²)⁵

• add
• subtract
• multiply
• divide

(-2)³⋅(-2)⁶

• (-2)⁹
• (-2)¹⁸
• (-2)⁻³
• (-2)

(2⁸)²

• 2¹⁶
• 2¹⁰
• 2⁶
• 2⁴

Simplify
x⁻⁶

• 1 ⁄ x⁶
• x⁶
• -x⁶
• -1 ⁄ x⁶

Simplify:  $7y^2\ -5y\ +\ 9y\ -\ 5y^2$  

•  $6y^{2\ }$  

•  $2y^{2\ }+\ 4y\$  

•  $12y^{2\ }+\ 14y$  

• Can't be simplified

How many terms does this expression have?
-18y + 7yz - 4z

• -18
• 3
• 7
• -4

What is the coefficient here?
-27m + 5

• 27
• -27
• 5
• m