Your anwer is option B. x=1/2
Answer:
x=6
Step-by-step explanation:
7+5 (x-3)=22
Subtract 7 from each side
7-7+5 (x-3)=22-7
5(x-3) = 15
Divide each side by 5
5(x-3)/5 = 15/5
x-3 = 3
Add 3 to each side
x-3+3=3+3
x=6
Since y is the original cost, let z represent the final cost. So, we set up the expression, (0.12y + y) - 0.03y = z. That shows first the sale, then the tax. From there, we simplify to get 1.12y - 0.03y = z, then simplify it more to get 1.09y = z. We take away the z, and get that the cost, which is 1.09, or 109%, or y (1.09y).
Turn the fractions into decimals by dividing the top number by the bottom number, then multiply that by 100 to make it a percentage:
34/40 = 0.85 x 100 = 85%
20/25 = 0.80 x 100 = 80%
53/60 = 0.883 x 100 = 88.3%
The Last one is the highest percentage, so 53/60 is the best score.
Answer:
(-9,3)
Step-by-step explanation:
6x and -6x cancel, leaving us 12y=36 which means y=3. Then we can plug it back into our equations leaving us with x=-9.
