Target b which yields a $3 prize 48% of the time. find the expected value of target b

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827