Anyone good at maths please help :((​

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a