The coordinate grid shows the plot of four equations
which set of equations has (1, 4) as its solution?

a and d
b and d
a and c
b and c

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4

Given right triangle abc, what is the value of tan(a)?

An incoming airplane is x miles due north from the control tower at an airport. a second incoming airplane is y miles due east of the same control tower. the shortest distance between the two airplanes is z miles. which of the following functions would best model the situation above?