Solve each system of linear equations by elimination. 5x-y=7 4x+8y=-12

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.

The surface area of the triangular prism is .

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.