. After 7 games a rugby team has a mean score of 15 points per game. After playing an 8th game
their mean increases to 18: how many points did they score in the 8th game?

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

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of