AFDA Benchmark Review

Find the error in the problem below

19 - 2k = 3k - 1

+3k +3k

19 + 1k = -1

-19 -19

k = -20

• They should have divided by 1 for the last step

• They should have added 19 instead of subtracting 19

• There is no error

• Instead of adding 3k, they should have subtracted 3k

Write y - 4 = -3 (x - 3)

• 3x + y = 13

• 3y + x = 13

• y + x =13

• x + y = 13

Graphically, the pair of equations 6x – 3y + 10 = 0 , 2x – y + 9 = 0 represents two lines which are

• intersecting at exactly one point
• intersecting at exactly two points.
• coincident. 
•  parallel.

What is the equation of a line with slope 3 and y-intercept of 7?

• y=-3x+7
• y=3x-7
• y=3x+7
• y=-3x-7

If m=3 and b=6, what is the correct slope intercept equation?

• y=3-6
• y=3x-6
• y=3x+6
• y=6x+3

12+5w-4w=15

• w=1
• w=3
• w=5
• w=4

20 + 2x = x + 56

• 36

• -36

• 56

• -56

Solve the equation
12x - 15 = 3(2x+3)

• x = 4
• x = -4
• x = 2
• x = -2

Translate this phrase into an algebraic expression.
8 less than the product of 4 and a number
Use the variable m to represent the unknown number.

• 8 - 4m
• 8m - 4
• 8m + 4
• 4m - 8

Solve:

2x = -16

• -8

• 8