Please help me!! Amy has 18 marbles. Four of her marbles are red and the rest are black.
What is the ratio of the number of black marbles to the number of red marbles?

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)

When a 757 passenger jet begins its descent to the ronald reagan national airport in washington, d.c., it is 3900 feet from the ground. its angle of descent is 6 degrees. how far must the plane fly to reach the run way? a. 37,106 ft b. 37,310.4 ft c. 23,456.6 ft d 2,492.7 ft