SWQ Review 1-1,1-4,1-5,1-6,1-7. Write an equation to represent the relationship “a number decreased by negative 2 is equal to 21.” Then solve the.

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Presentation transcript:

SWQ Review 1-1,1-4,1-5,1-6,1-7

Write an equation to represent the relationship “a number decreased by negative 2 is equal to 21.” Then solve the equation.

Solve each equation. 9(z  1)  2z  16  62

A car detailing company charges $30 plus $18 per hour. Another company charges $25 plus $20 per hour. How long is a job that costs the same no matter which company is used?

Solve and check

The length of 3 sides of a triangle are consecutive numbers. The perimeter of the triangle is 36 cm. What are the lengths of the three sides. (

7 + 3d – 5 = d – 12 - d Solve and check

The sum of three consecutive even integers is 20 less than four times the first integer. What are the integers ?

The formula d = rt relates the distance an object travels d, to its average rate of speed r, and amount of time t that it travels. a. Solve the formula d = rt for t. b. How many hours would it take for a car to travel 150 miles at an average rate of 50 miles per hour?

The formula F − E + V = 2 relates the number of faces F, edges E, and vertices V, in any convex polyhedron. a. Solve the formula F − E + V = 2 for F. b. How many faces does a polyhedron with 20 vertices and 30 edges have?

A machine manufactures wheels with a diameter of 70 cm. It is acceptable for the diameter of a wheel to be within 0.02 cm of this value. Write and solve an absolute-value equation to find the minimum and maximum acceptable diameters.

Inline skates typically have wheels with a diameter of 74 mm. The wheels are manufactured so that the diameters vary from this value by at most 0.1 mm. Write and solve an absolute-value equation to find the minimum and maximum diameters of the wheels.