Factorize: x² – 81.
- (x + 9)(x - 9)
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Factorize: x² – 81.
Simplify using exponent laws: 2^9 ÷ 2^1.
If f(x) = -2x – 6, find f(-1).
The sequence is 7, 5, 3, 1, … . What is the 10th term?
Simplify using exponent laws: (10^2)^3.
Let A = {1, 2, 9, 13, 17} and B = {9, 10, 13, 15, 17}. What is A ∩ B?
Simplify using exponent laws: 10^5 × 10^2.
Find the median of the data set: 16, 27, 29, 34, 38.
Find the median of the data set: 8, 14, 29, 30, 32.
Add the matrices [[7, 5], [1, -3]] and [[5, 3], [5, 7]].
Find the mode of the data set: 9, 10, 14, 24, 39, 39.
Solve the system: 1x + 2y = 11 and 2x – 1y = -3.
Solve the inequality: 3x + 4 ≤ -2.
Expand and simplify: (x + 1)(x – 1).
Find the slope of the line passing through (-1, 4) and (1, 1).
Solve for x: 8x – 9 = 47.
A student can choose from 5 shirts, 4 pants, and 1 pairs of shoes. How many different outfits are possible?
Factorize: x² – 9.
Solve for x: 10x – 9 = 31.
The sequence is 4, 1, -2, -5, … . What is the 15th term?