You can think of a 20% discount as only 80% of the original cost or:
Cost = 0.80x
Answer:
To see if an ordered pair is a solution to an inequality, plug it into the inequality and simplify. If you get a true statement, then the ordered pair is a solution to the inequality. If you get a false statement, then the ordered pair is not a solution.
Step-by-step explanation:
She bought 3 necklace and bracelet sets
Step-by-step explanation:
The given is:
- Selena spends $53.94 to buy a necklace and bracelet set for each of her friends
- Each necklace cost $9.99
- Each bracelet cost $7.99
We need to find how many necklace and bracelet sets she bought
Assume that the number of necklace and bracelet set is x
∵ Selena bought x necklace and a bracelet sets
- Each set contains a necklace and a bracelet
∵ Each necklace cost $9.99
∵ Each bracelet cost $7.99
∴ The cost of one set = (9.99 + 7.99)
∵ She spent on them $53.94
- Add the cost of a necklace and the cost of a bracelet and
multiply the sum by x and then equate the product by 53.94
∴ (9.99 + 7.99)x = 53.94
∴ 17.98 x = 53.94
- Divide both sides by 17.98
∴ x = 3
She bought 3 necklace and bracelet sets
Learn more:
You can learn more about the word problems in brainly.com/question/10557938
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(Base 1 + base 2) divided by 2 times height
