Exam 3: Linear Equations and Inequalities in Two Variables; Functions

Solve the problem. -A cashier has a total of 123 bills, made up of fives and tens. The total value of the money is $ 735. How many ten-dollar bills does the cashier have?

Solve the equation. - + = -

Use a formula to solve the problem -What is the area of a square with side 2.8 cm?

Solve the equation. -6m + 5 = 7m + 8

Choose the one alternative that best completes the statement or answers the question. -If x represents a positive integer, how would you express its negative?

Choose the one alternative that best completes the statement or answers the question. Solve the problem. -The sum of the measures of the angles of any triangle is 180°. In triangle ABC, angles A and B have the same measure, while the measure of angle C is 45° larger than each of A and B. What are the measures of the three angles?

Choose the one alternative that best completes the statement or answers the question. Solve the problem. -Find the measure of an angle whose supplement is 11 times the measure of its complement.

Write the answer to the problem as an algebraic expression. -Bill is q years old. How old will he be in 4 years? How old was he 5 years ago?

Translate the sentence into an equation using the variable x. -The sum of a number and 5 is 10.

Determine the number by which both sides of the equation must be multiplied or divided, as specified, to obtain just x on the left side. -- x = 7; multiplied

Solve the problem. -If a spring stretches 0.4 m when a 8-kg weight is attached to it, how much will it stretch when a 28-kg weight is attached to it?

Solve the problem. -Helen Weller invested $ 14,000 in an account that pays 3% simple interest. How much additional money must be invested in an account that pays 6% simple interest so that the average return on the two investments amounts to 4%?

Choose the one alternative that best completes the statement or answers the question. Solve the problem. -The parking lot at a grocery store has 65 cars in it. 80% of the cars are two-door. How many cars are two-door?

Choose the one alternative that best completes the statement or answers the question. Solve the problem. -A paint mixture contains 15 gallons of base for every gallon of color. In 640 gallons of paint, how many gallons of color are there?

Translate the sentence into an equation using the variable x. -A number minus 2 equals 4.

Solve the inequality. Write the solution set in interval notation and graph it. -A - 7 < -9

Solve the equation. - x - x = 5

Solve the equation. --8.7x + 1.8 = -76.3 - 1.6x

Solve the inequality. Write the solution set in interval notation and graph it. --4( 3y - 15) < -16y + 28

Write an inequality involving the variable x that describes the set of numbers graphed. -