four red boxes and two black boxes cost $40. Five red boxes cost $20. All red boxes cost the same. All black boxes cost the same. What is the ratio of the cost of a red box to the cost of a black box.

A four-sided polygon has these properties of rotation and reflection. When it rotates 360 degrees, it maps onto itself at four different angles of rotation. It can be reflected onto itself across four different lines of reflection.

After 5 months, the number of subscribers to a newspaper was 5,730. After 7 months, the number of subscribers to the newspaper was 6,022. Which equation models the number of newspaper subscribers y after x months?

Factor: a^2 m + 5am - 30m (A) 5m ( - 6 + a + a2) (B) m (a - 6) (a + 5) (C) 5m (a + 3) (a - 2) (D) m (5a + a2 - 30) (E) none of these

the length of one side of a rectangle is 12 more than the width. the perimeter of the rectangle is 56 cm. find the length and the width of the rectangle

Which expression can pair with x-y=-2 to create a consistent and dependent system? A. 6x+2y=15 B. - 3x+3y=6 C. - 8x-3y=2 D. 4x-4y=6

A track and field playing area is in the shape of a rectangle with semicircles at each end. The perimeter of the track is to be 1200 meters.

Nicole has a stack of 50 dishes to wash. It took her 2 minutes to wash 8 dishes. At this rate, how long will it take Nicole to wash all 50 dishes?

Jack bought 5 pounds of holloween candy. He gave out 3 pounds of the candy to trick or treaters and ate 10 ounces of the candy. How many ounces oof halloween candy does jack have

What is the value of n (-y+5.3) + (7.2y-9) = 6.2y+n

What is the momentum of a 79-kilogram ice skater gliding across the ice at a speed of 16 m/s?