2 882 = 2 x 32 x 72
60 = 22 x 3 x 5
(a) Find the highest common factor (HCF) of 882 and 60.

the highest common factor is 6

6

Step-by-step explanation:

60 = 22 × 3 × 5

882 = 2 x 32 x 72

HCF = 2 x 3

        = 6

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

the answer is 31.27mph