Algebra Exam

Find the slope, m, and the y-intercept, b, of the line whose equation is 2x + 3y = 12.

• m=2/3 b=6

• m=2/3 b=4

• m= -2/3 b=6

• m= -2/3 b=4

Martha decides to babysit for $6 per hour to earn money for a concert ticket that costs $25. Which inequality shows the number of hours, h, she needs to babysit to earn at least enough money to buy the concert ticket?

• 6h > 25
  

• 6+h > 25

• 6+h > 25

What is the equation, in slope-intercept form, of the line that passes through the point ( -3, 11) and has a slope of -4 ?

• y=-4x-1

• y=12x+11

• y=4x+1

• y=-4x+21

Jenny invested $300 in an account where her money doubles every 7 years. How much money will be in her account at the end of 35 years?

• $ 4,200

• $ 9,600

• $21,000

• $38,400

A Freight truck unloads 1/2 of its cargo at each depot. It starts with 64,000 lbs of cargo. When the truck leaves the 5th depot what is its weight?

• 6,400

• 2,000

• 500

• 160

What is the value of y for the solution to this system of equations?
 y= 3/2x+7      
x=-6

• y=-2

• y=-11/2

• y=11/2

• y=16

What is the solution to this system of equations?

y+x = 5x+3

12-y = x+2y

• x=1/4 , y=4

• x=6/11 , y=63/11

• x=3/13 , y=51/13

• x=21/13 , y=45/13

What is the solution, (x, y), to this system of equations?

• (8,-3)

• (9,10)

• (4,-5)

• (-8,-5)

What is the range of f(x) = -3(4x-5) ?

• All real numbers

Evaluate -3x-4y + 2z for x = -1, y = 2, and z = 3.

• -11

• -5

• -1

• 1