Find the sum of the infinite geometric series, if it exists. 4 - 1 + 1/4 -1/6 + a. - 1 b. 3 c. 1/6 d. does not exist

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

What is the area of the triangle 10 13 12

In right ∆abc shown below, the midpoint of hypotenuse ac is located at d and segment bd is drawn.if ab = 12 and bc = 16, then explain why bd = 10. hint: consider what you know about the diagonals of a rectangle.