16 17
Harry is tiling a wall of area 25 m2
A tub contains 15 kg of tile cement.
The instructions say 2 kg of tile cement will tile 1 m² of wall.
7 (a) How many tubs does Harry need to buy?

the function makes a strait line horizontally with no x intercept but a y intercept at 9.

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8