In the triangle ABC, the side lengths are BC=15 and AC=10.What is the angle measurement of A?

Sara sells beaded necklaces she makes a profit of 4 dollars pn every neclace she sells which table represents the profit sara makes

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

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?