PLEASE I need help I don’t understand this math and I have less then 20 minutes so help is really needed please also if you can check my page for the other questions that would be great

Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent.the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy.how much will she pay after the discount