PLEASE HELP >-< 5. Brandon solved the following system of equations by substitution. His partner Lisette checked his work and said she found an error. Where is Brandon's error and what did he do wrong?
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If a baby uses 15 diapers in 2 days how many diapers will the baby use in a year

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis.y = 7ex, y = 7e^-x, x = 1; about the y-axis