4. The curve C, has equation y on where a is a positive constant. The curve C, has
equation y
(x - b), where b is a positive constant.
a) Sketch C, and C, on the same set of axes. Label any points where either curve meets the
coordinate axes, giving your coordinates in terms of a and b.
(4)
b) Using your sketch, state the number of real solutions to the equation x(x – 5)=- 7.
(1)

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.