What is the value of x^3\cdot y^1x 3 ⋅y 1 x, start superscript, 3, end superscript, dot, y, start superscript, 1, end superscript when x=5x=5x, equals, 5 and y=10y=10y, equals, 10?

What is the product? (x2+3y+7) [yy+1)

Suppose 38 lbs of coffee beans are required to produce 2 lbs of farmer's coffee. how many lbs of coffee beans are required to produce 309 lbs of farmer's coffee?

Dana wants to identify the favorite professional baseball team of people in her community. she stands outside a local sporting goods store and asks every other person who enters, "what is your favorite professional baseball team? " will the results of her survey be valid? explain.