If (3,-4) is reflected across the y-axis, what are the coordinates of the new point? How far are the two points?

What is the equation of a line passing through (-6,5) and having a slope of 1/3

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )