91Ó°ÊÓ

Evaluate each of the following expressions, if possible. $$18-10[9-5(4-1)]$$

In Exercises \(73-84\), evaluate the given expression. $$7-3(5-1)$$

Factor the given number into its prime factors. If the number is prime, say so. $$165$$

Evaluate the given expression. Remember to follow the order of operations. $$48 \div(12 \div 4)$$

Evaluate the given expression. Remember to follow the order of operations. $$32+16 \div 8-6$$

In Exercises \(75-86,\) solve the problem by writing a sum of signed numbers and adding. A music recording company begins a month with an inventory of \(16,430\) compact discs (CDs). Suppose that we represent CDs that are shipped as negative numbers and those received as positive numbers. The company records the following transactions during the month: \(-1,800,-465,73,92,128,-166,\) and \(-2,750 .\) What is the company's inventory at the end of the month?

Evaluate the given expression. Remember to follow the order of operations. $$\frac{18-4 \cdot 2}{13-4 \cdot 2}$$

On a certain day the maximum temperature was \(12^{\circ} \mathrm{C},\) and the minimum temperature was \(-5^{\circ} \mathrm{C} .\) By how many degrees did the temperature vary on this day?

A helicopter is hovering at an altitude of 600 ft above sea level directly above a submarine that is submerged at a depth of 128 ft below sea level. What is the distance between the helicopter and the submarine?

Evaluate the given expression. Remember to follow the order of operations. $$\frac{5 \cdot 2+3 \cdot 4+6 \cdot 3}{4 \cdot 5+2 \cdot 6+4 \cdot 2}$$