Prove that the sum of two rational numbers is a rational number.

Is a 24, 32 and 40 a obtuse triangle?

A model of an airplane is 8 inches long. If the actual airplane is 32 feet, find the scale of the model. a. 8:1 b. 4in. = 1ft c. 1in. = 4ft d. 1:4

What is (x-4) ^2=28 when solved as a quadratic equation such as - 4+-2 square 7

A license plate is to consist of 33 digits followed by 44 uppercase letters. determine the number of different license plates possible if the first and second digits must be odd, and repetition is not permitted

A cylindrical metal pipe has a diameter of 8.4 millimeters and a height of 10 millimeters. A hole cut out of the center has a diameter of 6 millimeters. What is the volume of metal in the pipe? Use 3.

Find the area of a circle with radius 6 cm. Use the value 3.14 for pi, and do not round your answer. Be sure to include the correct unit in your answer.

Lola rode her bike for 7/10 of an hour on Saturday and 3/5 of an hour on Sunday. How much longer did she ride her bike on Saturday than Sunday?

Write a compound inequality that represents the situation. On a road in the city of Rochester, the maximum speed is 50 miles per hour, and the minimum speed is 20 miles per hour. A. 20 ≥ x ≥ 50 B. 20 < x < 50 C. 20 > x > 50 D. 20 ≤ x ≤ 50

The graph for the equation y=-x+2 is shown. If another equation is graphed so that the system has an infinite number of solutions, which equation could that be? A. y=-2 (x-1) B. y = - (x+2) C. y=-1/4 (4x-8) D. y=-1/2 (x+4)

Adenan makes a scale drawing of a rectangular flower box. The length is 5 in., and the width is 3 in. Adenan changes the scale of the drawing from 1 in. : 4 ft to 1 in. : 6 ft.