91Ó°ÊÓ

Perform the indicated operation. Write the answer as an algebraic expression. $$\frac{2}{3} \div \frac{a}{7}$$

Write a numerical expression for each phrase. Then simplify the numerical expression by performing the given operations. The difference between \(-11\) and the quotient of 20 and \(-5\)

Simplify: \(-8-2-(-5)+11 .\) (Section 1.6, Example 3)

Perform the indicated operation. Write the answer as an algebraic expression. $$\frac{11}{x}+\frac{9}{x}$$

Use the formula \(C=5(F-32)\) to express each Fahrenheit temperature, \(F,\) as its equivalent Celsius temperature, \(C\). $$-22^{\circ} \mathrm{F}$$

Determine whether each statement "makes sense" or "does not make sense" and explain your reasoning. I can find the closing price of stock PQR on Wednesday by subtracting the change in price, \(-1.23,\) from the closing price on Thursday, 47.19

Multiply: \(-4(-1)(-3)(2) .\) (Section 1.7, Example 2)

Perform the indicated operation. Write the answer as an algebraic expression. $$\frac{10}{y}-\frac{6}{y}$$

Use the formula \(C=5(F-32)\) to express each Fahrenheit temperature, \(F,\) as its equivalent Celsius temperature, \(C\). $$-31^{\circ} \mathrm{F}$$

Determine whether each statement "makes sense" or "does not make sense" and explain your reasoning. I found the variation in elevation between two heights by taking the difference between the high point and the low point.