The sum of all digits of some number is 210. The number is always divisible by: A. 3
B. 2
C. 5
D. 9
E. 10
Please show work and I will mark brainlist.

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?

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.