C
Multiple a and c so 2x6=12
Find the factors of twelve that add to equal 7
The factors are four and three
Put them in parenthesis with a in front of x so
(2x+3)(2x+4)
Four can be divided by two so it turns into
(2x+3)(x+2)
Pure gold is 24 Karat's so the ratio of purity 18 karat gold is:
(Number of Karats of Gold chain)/(Number of Karats of pure Gold)
this will give us:
18/24
=3/4
The weight of pure gold in 18 Karat Gold will be:
(ratio of purity)×(Total weight of chain)
=3/4×18
=13 1/2 ounces
=13.5 ounces.
Plug -15 for x
28 - (- -15) - |10|
28 - 15 - 10
3
