Fund the measure of angle 7. measure if angle 7=2x+15 measure if angle 8 =3x

The mean temperature for the first 4 days in january was 7°c. the mean temperature for the first 5 days in january was 5°c. what was the temperature on the 5th day?

Factorize: x^2+8x+10 i just solved it but i don't know if the process is correct

At his new job, jeremiah can choose an hourly rate of $9 plus a $50 weekly bonus for opening the store, or an hourly rate of $10 per hour with no opening bonus. the equations model his salary options. y = 9x + 50 y = 10x