What ratio is equivalent to 4: 5 a. 10/15 b. 4/10 c. 16/20 d. 15/8

Hello everybody. can anybody me come up with detailed study plan on what topics to study from algebra 1 & 2, trig, and any other topic nesscery for success as a new beginner in pre-calculus. i dont have much math history but the basics. this will greatly me.

Ajar contains a mixture of 20 black marbles, 16 red marbles, and 4 white marbles, all the same size. find the probability of drawing a white or red marble on the first draw. 125 12 01 next question ask for turn it in

What is the slope of the line passing through the points (-5, 7) and (-3,5)?