Which equation could be used to determine the area of a rectangle that is 4 cm wide and 10 cm long? a. a = 4 + 10 b. a = 4 × 10 c. a = 2 × (10 + 4) d. a = 2 × 10 + 2 × 4

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?