given that A, B and C are angle of a triangle prove that:<br /> sin B + sin C = 2cos A/2 cos B-C/2​

Segment ab is shown on the graph. which shows how to find the x-coordinate of the point that will divide ab into a 2: 3 ratio using the formula

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

The graph shows the distance kerri drives on a trip. what is kerri's speed?