Algebra Basics: Equations & Functions

Question 1

Solve for x: 2x + 6 = 14

A 2 B 4 C 6 D 10

💡 Explanation

4 is correct because 2x = 14 - 6 = 8, so x = 8 / 2 = 4.

Question 2

What is the slope of the line y = 3x + 2?

A 2 B 3 C 5 D 1

💡 Explanation

3 is correct because in y = mx + b, the coefficient m (here 3) is the slope.

Question 3

Simplify: 5x + 3x

A 8x B 15x C 8 D 2x

💡 Explanation

8x is correct because 5x and 3x are like terms that add to 8x.

Question 4

If f(x) = x² and x = 3, what is f(x)?

A 6 B 9 C 3 D 12

💡 Explanation

9 is correct because f(3) = 3² = 9.

Question 5

What is the value of x in x - 7 = 0?

A -7 B 0 C 7 D 14

💡 Explanation

7 is correct because adding 7 to both sides gives x = 7.