RC 4 Algebra I

Which expression is equivalent to (10 + 7r − r²) + (−6r² − 18 + 5r)?

• −7r² + 2r + 8

• 7r² + 12r + 8

• −7r² + 12r − 8

• 7r² + 2r − 8

Which expression is a factor of 36x² - 49?

• 18x - 7

• 6x - 49

• 18x - 49

• 6x - 7

Simplify

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8r³ - 16r²

• 4r²(2r - 4)

• 8r²(r - 2)

• 8(r³ - r²)

• 4(r³ - 2r²)

Simplify: (x - 9)(x - 7)

• x² - 2x - 63

• x² - 16x - 63

• x² - 2x + 63

• x² - 16x + 63

What is the y-intercept of the function

Mathematical Equivalence

ON

The original value of a painting is $1400, and the value increases by 9% each year. Write an exponential growth function to model this situation. ​ ​ (a)  

You buy a new computer for $2100. The computer decreases by 50% annually. When will the computer have a value of $600? (a)  

• between 1 and two years

• more than 5 years

• less than a year

• between 3 and 4 years

Which of the following is an exponential function?

• y = x²

• f(x) = 3x³

• y = x³

• f(x) = 3^x