30 children are going on a trip. it costs £5 including lunch. some children take their own packed lunch. they pay only £3.the 30 children pay a total of £110.
how many children are taking their own packed lunch?
( show your working)

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π

50 plz, given the system of equations, match the following items. x + 3 y = 5 x - 3 y = -1 a) x-determinant b) y-determinant c) system determinant match the following to the pictures below.