Simon makes 30 cakes he gives 1/5 of the cakes to sally and gives 10% of the cakes to Jane what fractions of the 30 cakes does he have left.

15 cakes left.

Step-by-step explanation:

1/5 of 30 = 6 this finds the amount given to Sally.

30 - 6 = 24 this finds the total afterward.

30% of 30 = 9 this finds the amount given to Jane.

24 - 9 = 15 This finds the total.

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

3/4 ÷ 3/4

step-by-step explanation:

basically divide any proper fraction with itself to fit the criteria.

so if we are using 3/4, then:

3/4 ÷ 3/4 = 1

so 1 is the quotient.

and the numerators for both these fractions is 3.   and if we divide the numerators:

3 ÷ 3 = 1

we see that quotient is equal to our original quotient as well.