Carmen has given 6 coins to her brother<span />
Add all the numbers of the triangle and then divide them by the sides
5n + (-6) = -2
add 6 to -2
5n = -2 + 6
5n = 4
divide both sides by 5
n = 4/5
Use the formula
(
b
2
)
2
in order to create a new term. Solve for
x
by using this term to complete the square.
Exact Form:
x
=
±
√
5
−
8
Decimal Form:
x
=
−
5.76393202
…
,
−
10.23606797
She had to spend 50 cents... since nickels value at 5 cents, 10 5 cent coins value at 50 cents
Hope this helps
