Circle all the expression that are equivalent to 24? A. 3(6)
B. 6(4)
C. 2+12
D. 10+14
E. 48 over 2
F. 48 divided by 2
G. 30-8
H. 8+8+4
I. 4(2+10)
J. 12(4+4)

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

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5

c. side angle side. u shares the same sides