A biologist measures and records the height of two plants at the end of each day. After several days, the blologist determines that each plant's daily height can be represented by these equations • Plant #1: h=2.5d + 10.0
• Plant #2: h=2.5d + 7.5
In both equations, d represents the day and h the height of the plant in millimeters. The scientist wants to know when the plants will be the same height. By looking at the two equations and
without graphing or solving algebraically, when will the plants be the same height? Explain your answer.

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

Select a graph that have an equation with a < 0