50% of all the cakes jenny baked that week were party cakes, 1/5 were fruit cakes and the remainder were sponge cakes what percentage of cakes were sponge cakes

 30% of the cakes were sponge cakes.

Step-by-step explanation:  We are given that 50% of the cakes Jenny baked that week were party cakes, one-fifth were fruit cakes and the remainder were sponge cakes.

We are to find the percentage of cakes that were sponge cakes.

Let n represents the number of cakes that Jenny baked.

According to the given information, we have

Therefore, the number of sponge cakes is given by

Therefore, the percentage of cakes that were sponge cakes is given by

Thus, 30% of the cakes were sponge cakes.

b

step-by-step explanation:

the word superfluous means unnecessary

see attached

step-by-step explanation:

given the function as;

write the equation replacing f(x) with y

form   and fill a table containing values of y with corresponding values of x

you can take a range for   values of x as -3≤x≤3

solving for x=-3

for x=-2

repeat the same procedure to get the values of y for the remaining ,x=-1 to x=3

plot the values of y against values   of x and obtain the following graph