Need help to solve Solving system of equation by Substitution method ( standard form) y= -7x-23
3x-4y= 30

This is what I have so far, but I'm stuck at the last part where I have to divide -25x with 122 which gave me a decimal number.

The sketch shows two parallel lines cut by a transversal. angle 2 2 is 36° 36 ° . what is the measure of angle 8 8 ?

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

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