I’m so confused on elimination. my teacher thought me to do it one way but i’m still confused (system of equations) how do i solve elimination problems?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Emily is entering a bicycle race for charity. her mother pledges $0.90 for every 0.75 mile she bikes. if emily bikes 18 miles, how much will her mother donate?

Consider an example of a deck of 52 cards: example set of 52 playing cards: 13 of each suit clubs, diamonds, hearts, and spades ace 2 3 4 5 6 7 8 9 10 jack queen king clubs diamonds hearts spades what is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.