Mathematics Questions 9thgrade midterm

What is the difference when $2x^2 + 3x - 7$ is subtracted from $5x^2 - 4x + 10$?

• $3x^2 - 7x + 17$

• $3x^2 + 7x - 17$

• $7x^2 - x + 3$

• $-3x^2 + 7x - 17$

What is the value of $2x^2 + 5x - 3$ when $x = -3$?

• -30

• -24

• 24

• 30

Solve for $x$: $\frac{x}{6} + 3 = 9$. What is the value of $x$?

• 18

• 36

• 24

• 30

What is the product of \( (x - 3)(x^2 + 4x - 2) \)?

• \(x^3 + x^2 - 14x + 6\)

• \(x^3 - 3x^2 + 4x - 6\)

• \(x^3 + x^2 - 4x - 6\)

• \(x^3 - 3x^2 + 4x + 6\)

What is the simplified product of \( (5ab^2)(-4a^3b) \)?

• \(-20a^4b^3\)

• \(20a^4b^3\)

• \(-20a^3b^2\)

• \(20a^3b^2\)

What is the equation of a line whose slope is -2 and passes through the point (-4, 1) in slope-intercept form?

• y = -2x - 7

• y = -2x + 7

• y = 2x - 7

• y = 2x + 7

Factor completely: $5x^3 - 10x^2 - 120x$

• $5x(x^2 - 2x - 24)$

• $5x(x - 6)(x + 4)$

• $5(x^3 - 2x^2 - 24x)$

• $5x(x - 4)(x + 6)$

Express the following in simplest radical form: $6\sqrt{392}$

• $12\sqrt{7}$

• $24\sqrt{7}$

• $36\sqrt{7}$

• $48\sqrt{7}$

Solve for x: \(\frac{2}{5}(x - 2) = x + 6\)

• x = -10

• x = -8

• x = 8

• x = 10

Which of the following is a rational number?

• a) \(\sqrt{3} + \sqrt{3}\)

• b) \(6\sqrt{8}\)

• c) \(\sqrt{3} \cdot \sqrt{12}\)