HELP! I need help with this math problem
-10+10x-7x+7

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great

Adriana had a garden where he measured the height of a corn plant. what. on the first day, it was 145 cm tall. after 2 weeks is grew by 23 cm. what is the height of the corn plant

Algebraically prove that a clockwise and counterclockwise rotation of 180° about the origin for triangle abc are equivalent rotations.