How would you explain to someone (in words and/or with pictures) why reflecting a shape across the y-axis changes one coordinate but not the other?

An astronaut drops a rock into a crater on the moon. the distance, d(t), in meters, the rock travels after t seconds can be modeled by the function d(t)0.82. what is the average speed, in meters per second, of the rock between 5 and 10 seconds after it was dropped?

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.