Whats the midpoint of DE if D is (6,6) and E is (-2,2)

What is the y intercept of f(x)=(1/2)^x?

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?