Elementary Algebra

Which of the following statements must be true whenever n, a, b, and c are positive integers such that n < a, c > a, and b > c ?

• b – n > a –n

• a < n

• b < n

• n + b = a + c

• 2n > a + b

What is the slope of any line parallel to the line 9x + 4y = 7 ?

• -9

• 7

• 9

The graph of y = −5x² + 9 passes through (1,2a) in the standard (x,y) coordinate plane. What is the value of a ?

• 2

• 4

• 7

• -1

• -8

A function f(x) is defined as f(x) = −8x² . What is f(−3)?

• -72

• 72

• 192

• -576

• 576

A rare baseball card is currently worth $300. Its value increases 20% each year. What will its value be in 10 years? (Round your answer to the nearest cent.)

• $330.20

• $600.00

• $1857.52

• $70585.88

If 2y + 8x = 11, what is the value of 3(2y + 8x)?

• 33

• 41

• 32

• 14

If a + b = 7 and b = 3, then what is 4a?

• 40

• 16

• 28

• 4

Simplify the following Algebraic Expression
v + 4v - y + 2 +6vy + y

• 5v + 6vy + 2

• 5v - 6vy + 2

• 5v + 6vy - 2

• 5v - 6vy - 2

If x = y - 3, then (y-x)³ =

• 3

• 27

• 9

• -27

Solve for x:
7x + 2 = -54

• 8

• -8

• 9

• -9