The coordinate bridge shows the cost of different numbers of bookmarks how many sense do for bookmarks cost.

54 cents

Step-by-step explanation:

The cost of bookmarks relating to the number of bookmarks is given by the graph shown. Therefore:

From the graph, we can determine the relationship between the cost of bookmarks and the number of bookmarks by using two points. The equation of a line passing through points is:

From the graph, y represents the cost of bookmarks in cents and x represent the number of bookmarks. we can see that it passes through the point (2, 30) and (7, 90). Hence:

The cost of 4 bookmarks (x = 4):

y = 12(4) + 6

y = 54 cents

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

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step-by-step explanation: