Jacob bought a new circular saw . then he bought 8 different blades for it. each blade cost $23 . how much did jacob spent on all ?

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?

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Solve x+3y=6 and 4x-6y=6 by elimination . show work !