Simplify √63 as much as possible.
Correct answer(s):
- 3√7
Subject
Mathematics
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Solve the inequality: 7x + 9 ≤ 37.
Correct answer(s):
- x ≤ 4
If U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12} and A = {3, 7, 9, 10, 11}, what is A′?
Correct answer(s):
- {1, 2, 4, 5, 6, 8, 12}
A fair 5-section spinner and a fair 5-section spinner are spun once. What is the probability of getting one chosen section on each spinner?
Correct answer(s):
- 1/25
If f(x) = 5x + 7, find f(-5).
Correct answer(s):
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If f(x) = 5x – 6, find f(-2).
Correct answer(s):
- -16
If f(x) = 6x + 9, find f(-1).
Correct answer(s):
- 3
A bag has 6 red, 3 blue, and 2 green marbles. What is the probability of choosing a red marble?
Correct answer(s):
- 6/11
Simplify √468 as much as possible.
Correct answer(s):
- 6√13
If f(x) = 3x – 1, find f(6).
Correct answer(s):
- 17
A student can choose from 4 shirts, 5 pants, and 1 pairs of shoes. How many different outfits are possible?
Correct answer(s):
- 20
Expand and simplify: (x – 2)².
Correct answer(s):
- x² - 4x + 4
The sequence is 3, 5, 7, 9, … . What is the 12th term?
Correct answer(s):
- 25
Factorize: x² – 81.
Correct answer(s):
- (x + 9)(x - 9)
Simplify using exponent laws: 2^9 ÷ 2^1.
Correct answer(s):
- 2^8
If f(x) = -2x – 6, find f(-1).
Correct answer(s):
- -4
Solve the system: 2x + 3y = 12 and 1x – 1y = -4.
Correct answer(s):
- x = 0, y = 4
Find the range of the data set: 11, 15, 16, 22, 28.
Correct answer(s):
- 17
Solve for x: 8x – 3 = -35.
Correct answer(s):
- -4
Which statement is true for the number 12?
Correct answer(s):
- 12 is even and divisible by 3