$5800 at 9%
$1200 at 11%
0.09(x) = interest earned at 9%
0.11(7000-x) = interest earned at 11%
0.09(x) + 0.11($7000-x) = $654
0.09x + $770 - 0.11x = $654
$770 - $654 = 0.11x - 0.09x
$116 = 0.02x
$116/0.02 = x
$5800 = x
$5800 * 0.09 = $522
($7000-$5800) * 0.11 = $132
Remember.
positive number x positive number = positive number
positive number x negative number = negative number
negative number x positive number = negative number
negative number x negative number = positive number
So if both numbers have the same sign, either both positive or both negative, then the product will be positive.
Answer: $6.75
Step-by-step process:
100%-25%=75%
therefore, they will cost 75% of the original price
75% of $9.00 = .75*9
= $6.75
2 students have both their nose and ears pierced
