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A student solves 3(x + 4) as 3x + 4. What is the mistake?
Correct answer(s):
- The 3 was not multiplied by 4
Solve for x: 3(x – 6) + 7 = -17.
Correct answer(s):
- -2
y varies directly as x. If y = 16 when x = 4, what is the constant of variation?
Correct answer(s):
- 4
Select all numbers that satisfy x ≥ 2.
Correct answer(s):
- 3
- 2
What type of equation is 3x + 3 = 3x + 6?
Correct answer(s):
- No solution
The length of a rectangle is 9 cm more than its width. If the perimeter is 74 cm, what is the width?
Correct answer(s):
- 14 cm
A quantity increases by 25% and becomes 100. What was the original quantity?
Correct answer(s):
- 80
Factor: x^2 – 16.
Correct answer(s):
- (x - 4)(x + 4)
Simplify: y^(-6), where y ≠ 0.
Correct answer(s):
- 1/y^6
Solve the system: x + y = 1 and x – 2y = 16.
Correct answer(s):
- (6, -5)
What is the slope of the line passing through (4, -2) and (12, 10)?
Correct answer(s):
- 3/2
The sequence begins 10, 7, 4, 1, … . What is the 9th term?
Correct answer(s):
- -14
Solve the inequality: 6x + 5 < 65.
Correct answer(s):
- x < 10
Factor the greatest common factor from 14x + 21.
Correct answer(s):
- 7(2x + 3)
Simplify: (-8x – 6y – 11) + (4x + 6y – 5).
Correct answer(s):
- -4x - 16
Solve for x: 3x – 7/3 = -10/3.
Correct answer(s):
- -1/3
A student says x^2 + x^3 = x^5. What is the mistake?
Correct answer(s):
- Unlike powers were added as if multiplying
Solve for x: 4(x + 4) – 9 = 35.
Correct answer(s):
- 7
y varies directly as x. If y = 28 when x = 7, what is the constant of variation?
Correct answer(s):
- 4
Select all numbers that satisfy x > 5.
Correct answer(s):
- 6