Solve for c by simplifying both sides of the equation, then isolating the variable.
C=36.5
Answer:
she bought 5 cards, which equals to $54
and then she bought 1 card
Step-by-step explanation:
The complement of at least one television being defective of 15 shipped televisions is that none of the television is defective.
Answer:
x = -3/28
Step-by-step explanation:
Start of by subtracting 3/7
7/14 - 6/14 = 1/14
-2/3x = 1/14
Divide -2/3, don't forget to reciprocate your fraction since you are dividing.
1/14 * -3/2 = -3/28
x = -3/28
let the weight of the second alloy be y
convert the percentage to fraction, that is 10/100=0.1, 18/100=0.18, 13/100=0.13
Total weight if the mixture is 0.1 x 25+0.18y=0.13(25+y)
2.5+0.18y=3.25+0.13y
like terms together
0.18y +0.13y = 3.25-2.5
0.05y=0.75
divide both side by 0.05
Y is therefore 15 pound of 18% copper is needed