Draw a rhombus with diagonals 4 and 6. What is the area of the rhombus?

first of all you have to draw a rhombus

area (d+d)/2

(4+6)/2

5

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

it’s supposed to be -4+45=41

step-by-step explanation: