Solve for x: 8x – 9 = 47.
Correct answer(s):
- 7
Subject
Advanced Mathematics
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Quizzes in Advanced Mathematics for Grade 8
A student can choose from 5 shirts, 4 pants, and 1 pairs of shoes. How many different outfits are possible?
Correct answer(s):
- 20
Factorize: x² – 9.
Correct answer(s):
- (x + 3)(x - 3)
Solve for x: 10x – 9 = 31.
Correct answer(s):
- 4
The sequence is 4, 1, -2, -5, … . What is the 15th term?
Correct answer(s):
- -38
Which statement is true for the number 15?
Correct answer(s):
- 15 is prime or divisible by 5
If f(x) = -3x – 8, find f(8).
Correct answer(s):
- -32
The probability that it rains tomorrow is 1/4. What is the probability that it does not rain?
Correct answer(s):
- 3/4
Find the mean of the data set: 5, 26, 37, 38, 39.
Correct answer(s):
- 29
Factorize: x² – 100.
Correct answer(s):
- (x + 10)(x - 10)
Simplify √52 as much as possible.
Correct answer(s):
- 2√13
Find the slope of the line passing through (-1, 5) and (2, 4).
Correct answer(s):
- -1/3
Factorize: x² – 64.
Correct answer(s):
- (x + 8)(x - 8)
Solve the system: 1x + 2y = -5 and 2x – 1y = 0.
Correct answer(s):
- x = -1, y = -2
Write 0.00084 in scientific notation.
Correct answer(s):
- 8.4 × 10^-4
Solve the system: 1x + 2y = -7 and 2x – 3y = 0.
Correct answer(s):
- x = -3, y = -2
Which statements about the sequence 4, 7, 10, 13, … are true?
Correct answer(s):
- The nth term is 3n + 1
- The common difference is 3
- The 10th term is 31
Factorize: x² – 16.
Correct answer(s):
- (x + 4)(x - 4)
Let A = {2, 3, 8, 10, 13} and B = {2, 3, 4, 6, 12, 13}. What is A ∩ B?
Correct answer(s):
- {2, 3, 13}
A fair 2-section spinner and a fair 3-section spinner are spun once. What is the probability of getting one chosen section on each spinner?
Correct answer(s):
- 1/6