Which of the following numbers is the slope of the line tangent to the curve y=x2+5x at x=3?

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters

What are linear equations? could'ya explain too me, ? ! and how do you see what graph is a proportional relationship?