A pencil and eraser together cost 55 cents. The pencil costs 50 cents more than the eraser. How much does the eraser costs

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?

Hurry if the population of of an ant hill doubles every 10 days and there are currently 100 ants living in the ant hill what will the ant population be in 20 days