Review #2

Add the polynomials:
(2x+5y) + (3x-2y)

• 3x + 5y
• 5x + 3y
• 5x + 7y
• 7xy + 1xy

Simplify the expression.
-3x²( 7x² - x + 4)

• -21x⁴ + 3x³ -12x²
• 7x² - x + 4 (-3x²)
• 21x⁴ + 3x³ + 12x²
• -12x² + 3x³ -21x⁴

(5x+2)(x²-3x+6)

• 5x³ - 17x² +24x +12
• 5x³ + 17x² - 24x +12
• 5x³ - 13x² + 24x +12
• 5x³ +13x² - 24x - 12

Which of these expressions CANNOT be multiplied together?

• (³√6)(√7)
• (⁴√3)(⁴√18)
• (√16)(√4)
• (³√5)(³√-25)

Simplify. Assume that all variables are positive. $\sqrt{20x^3}$   

•  $x\sqrt{10}$  

•  $2x\sqrt{5x}$  

•  $10x$  

•  $2\sqrt{10x}$  

Divide and simplify. Assume that all variables are positive.  $\frac{\sqrt{180x^5}}{\sqrt{5x^3}}$   

•  $6x^2$  

•  $12x$  

•  $6x$  

•  $12x^2$  

Rewrite 3⁴ = 81 in logarithmic form.

• log₃4 = 81
• log₈₁3 = 4
• log₃81 = 4
• log₄81 = 3

Find the inverse of
f(x) = 1/4x - 7

• f^-1(x) = 4x + 7
• f^-1(x) = -4x + 28
• f^-1(x) = -4x - 7
• f^-1(x) = 4x + 28

 Solve the equation.

• 36
• 18
• -18
• 27

This is an example of:

• Linear Growth

• Linear Decay

• Exponential Growth

• Exponential Decay