Expression & Operations pre-REM

Multiple Choice

Which is equivalent to $$\left(-2ab^3\right)\left(-3a^2b^5\right)$$ ?

• $$6a^3b^2$$

• $$6a^2b^{15}$$

• $$-5ab$$

• $$6a^3b^8$$

Multiple Choice

Which expression is equivalent to $$2x^3y\left(x^2y-3xy^2\right)$$ ?

• $$2x^6y-6x^3y^3$$

• $$2x^5y^2-6x^4y^3$$

• $$2x^6y^2-6x^3y^2$$

• $$3x^5y^2-5x^4y^3$$

Multiple Choice

If y≠0, which expression is equivalent to the one shown below?

• $$\frac{6x}{y^2}$$

• $$\frac{x}{y^2}$$

• $$\frac{x^7}{y^8}$$

• $$\frac{x^6}{y^{12}}$$

Multiple Choice

When simplified, $$\left(2x^2y^3\right)^4$$ equals-

• $$16x^6y^7$$

• $$8x^8y^{12}$$

• $$8x^6y^7$$

• $$16x^8y^{12}$$

Multiple Choice

Lincoln High School earned $5,100 in ticket sales for a play. The cost per ticket was $12. Let t𝑡 represent the number of tickets sold to the play. Which of the following equations could be used to determine how many tickets were sold to the play?

• $$t=5,100\ \circ\ 12$$

• $$12=5,100t$$

• $$12t=5,100$$

• $$t=5,100\ -12$$