Katelyn needs 2 3/4 cups of sugar to make brownies. She only has 1 1/8 cups. How many more of sugar does Katelyn need for the brownies

For each proportion find the unknown number x 1/5/8=×/15

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

What are the domain and range of f(x)= -log5(x+2)