Amanda and Barbara each bought blue salvias and zinnias. Amanda spent $261 on 12 blue salvias and 15 zinnias. Barbara spent $218 on 6 blue salvias and 20 zinnias. What is the cost of one blue salvia and the cost of one zinnia

Can someone answer it, and plot it, for 20 points and brainliest answer? p. s. they're the same ! : )

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.

What is the perimeter of an equilateral triangle if each side is (x+3)?