Substituting a Value
Evaluate 3x + 7 when x = 4.
A: What is 19?
Simplify and evaluate: 2(x + 3) when x = 5.
A: What is 16?
Find xy when x = 3 and y = 4.
A: What is 12?
Calculate -2x when x = 6.
A: What is -12?
Evaluate x/2 + 3 when x = 10.
A: What is 8?
Evaluate x² - 5x + 6 when x = 3.
A: What is 0?
Simplify and evaluate: 4(2x - 5) + 3x when x = 2.
A: What is 15?
Calculate 2x + 3y when x = 5 and y = -2.
A: What is 4?
Evaluate |x - 8| when x = -2.
A: What is 10?
Calculate (x + 5)/3 when x = 7.
A: What is 4?
Evaluate 2x³ - 3x² + 4 when x = 2.
A: What is 8?
Simplify and evaluate: 3(x² - 4) - 2(x - 1) when x = 3.
A: What is 17?
Find the value of x²y - xy² when x = 2 and y = 3.
A: What is -6?
Evaluate -3(x - 4)² when x = 2.
A: What is -12?
Calculate (2x - 1)/(x + 3) when x = 5.
A: What is 9/8 or 1.125?
Evaluate √(x² + 9) + x when x = 4.
A: What is 9?
Simplify and evaluate: (x² - 4)/(x - 2) when x = 4.
A: What is 6?
Calculate (x + y)²/(x - y) when x = 5 and y = 2.
A: What is 49/3?
Evaluate (-x)³ - (-y)² when x = 2 and y = 3.
A: What is -17?
Simplify and evaluate: (x/3 + 2/x) when x = 6.
A: What is 2 + 1/3 or 7/3?
Evaluate x·sin(πx/2) when x = 1. π = pi
A: What is 1?
Simplify and evaluate: (x³ - 1)/(x - 1) when x = 3.
A: What is 13?
Calculate (x²y + xy²)/(xy) when x = 4 and y = 2.
A: What is 6?
Evaluate the expression: (-2)^x + x^(-2) when x = -3.
A: What is -1/9 + 1/9 = 0?
Calculate (1/x + 1/y)/(1/x - 1/y) when x = 6 and y = 3.
A: What is 3?