What is the solution of the following system 3x+3y=10 -9x-9y=-30

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Assume that 1400 births are randomly selected and 1378 of the births are girls. use subjective judgment to describe the number of girls as significantly high, significantly low, or neither significantly low nor significantly high. choose the correct answer below. a. the number of girls is neither significantly low nor significantly high. b. the number of girls is significantly high. c. the number of girls is significantly low. d. it is impossible to make a judgment with the given information.