How do you work this problem (21:7) * 4=

is this correct?

3*4=12

Two trucks are driving to the same place. The first truck starts 50 miles ahead of the second truck and travels at an average speed of 60 miles per hour. The second truck travels at an average speed of 70 miles per hour.

Explain how you can tell that 31/33 is in the simplest form

Jessica bought 4 packages of baseball cards. she gave 3 cards to her brother how many cards does she have left

What is 8 - (b-2) = 11 in a equation solve for b?

Tom has read 2 books for school. Tom read 1/2 of the first book on Thursday and 5/12 of the second book on Friday. What total fraction of these two books has Tom read

Find the product 2cd^4 (-4c^6d^5-c^3d)

The width of a room is 60% of the land is 10 feet what is the area of the room

What is the remainder of the function f (x) = x^4-3x^3+7x-1 is divided by (x-2) A. 2 B. 5 C. 17 D. 25

Find the interior angles of a heptagon

5x + 3 = 7x - 1. Find x a. 1/3 b. ½ c. 1 d. 2