Suppose that you want to blend two coffees in order to obtain a new blend. the blend will be made with the best arabica beans that sell for 9.00$ per pound and select african robustas that sell for 11.50$ per pound to obtain 100 pounds of the new blend. the new blend will sell for $10.00 per pound and there is no difference in revenue. how many pounds of the arabica and the robusta beans are required?

What is x and y (use substitution? ) 5x+3y=38 and y=3x+8?

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?