The table shows information about the faces, edges and vertices for some pyramids. Shape of baseFacesEdgesVertices
Triangle464
Square585
Pentagon6106
Hexagon7127

Write a formula that connects the number of sides of the base,
S
,
with the number of faces,
F
.
Hence, work out the number of faces a pyramid with a 70-sided base has.

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?

How to solve a simultaneous equation involved with fractions?

Can someone me with this problem i don't understand i need