Which is the equation of a hyperbola with directrices at x = ±2 and foci at (4, 0) and (−4, 0)? x squared over 8 minus y squared over 8 equals 1
x squared over 8 minus y squared over 16 equals 1
y squared over 8 minus x squared over 8 equals 1
y squared over 16 minus x squared over 8 equals 1

Find the area of a trapezoid with a height of 23, base 1 of 10 and base 2 of 18

Write an equation for the function that includes the points (2,100)and (3,100)

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?