1/13(Wed) Quantitative Algebra

1/13(Wed) Quantitative Algebra

Multiple Choice

• A

• B

• C

• D

Multiple Choice

Factor

a² + 10a + 21 = 0

• (x-3)(x-7)

• (x+3)(x-7)

• (x-3)(x+7)

• (x+3)(x+7)

Multiple Choice

Solve

a² + 2a - 24 = 0

• (x+6)(x-4)

• (x-6)(x-4)

• (x+6)(x+4)

• (x-6)(x+4)

Multiple Choice

Which equation has w = 8 as the solution?

• 8w= 64

• 16w = 240

• 16 - w = 9

• 4 + w = 10

Multiple Choice

Which equation has x = 5 as the solution?

• x + 15 = 10

• 2x = 5

• 2x = 10

Multiple Choice

What are the roots of (6r-1)(r+5)=0?

• r= 1 and r= 5

• r= 6 and r= 0

• r= - 1/6 and r= 5

• r= 1/6 and r= - 5

Multiple Choice

Solve

a² + 10a + 21 = 0

• ± √21

• -3 , -7

• 3 , 7

• 28 , -7

Multiple Choice

Solve

a² + 2a - 24 = 0

• a = -6, 4

• a = 6, -4

• a = 12, -2

• a = 8, -3

Multiple Choice

Solve

h² + 7h + 10 = 0

• A. h= -5, -2

• B. h= 5, 2

• C. h = -1, ^-10/₆

• D. h = ^-2/₅, -10

Multiple Choice

Does this graph have any roots?

• yes

• no

• I am not sure.

Multiple Choice

What are the zeros of this graph?

• x = {-4, 2}

• (-4, 0 ) and (2, 0)

• x = {-1, 0}

• (-1, 9 ) and (0, -8)