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boyakko [2]
2 years ago
6

A jewelry store is having a 40% off sale for all necklaces. During this sale, what is the cost of a necklace that regularly cost

s $45?
Mathematics
1 answer:
ELEN [110]2 years ago
6 0

Answer: 18 dollars

Step-by-step explanation:

0.40 times 45 = 18 dollars

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To find y we know that angle x and and y are angles formed on a straight line that are split up by a triangle segment. These angles are called supplementary angles which add up to equal 180.

So knowing that angle x = 75 we can find angle y by subtracting 75 from 180

180-75=105 so y = 105

Another way we could solve for y is the exterior triangle rule

This rule states that an exterior angle of a triangle is equal to the two opposite interior angles

so y = 45 + 65

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Step-by-step explanation:

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