3 years ago

Can you pls help me with this

Mathematics

1 answer:

ahrayia [7]3 years ago

3 0

Answer:

it's (1, 2)

Step-by-step explanation:

you just look at where the 2 lines cross

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Ms. Katz paid $50 for a used bicycle and then sold it to her neighbor for $60. She decided to buy it back, but she had to pay $7

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Step-by-step explanation:

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What equation results when you cross - multiply 17/d = 51/21

nekit [7.7K]

Answer:

$51d=357\\\\d=\frac{357}{51} \\\\d=7$

Step-by-step explanation:

A proportion is an equation that defines that two ratios are equal. When the terms of a proportion are cross multiplied, the cross products are equal. Cross multiplication is the multiplication of the numerator of the first ratio by the denominator of the second ratio and the multiplication of the denominator of the first ratio by the numerator of the second ratio:

$\frac{a}{b} =\frac{c}{d} \rightarrow ad=bc$

Therefore:

$\frac{17}{d} =\frac{51}{21} \\\\17*21=d*51\\\\357=51d\\\\Solving\hspace{3} for\hspace{3} d\\\\d=\frac{357}{51} \\\\d=7$

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