A grocery store buys items and then applies a markup of 75%. What is the retail price of item that originally costs $5.40

Mathematics

1 answer:

ikadub [295]2 years ago

8 0

Answer:

$9.45

Step-by-step explanation:

$5.40 × 75% = 4.05

$5.40 + $4.05 = 9.45

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x = 1.25

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$\frac{5}{x + 5} = \frac{7}{y + 7} = \frac{8}{10} \\ \\ \implies \frac{5}{x + 5} = \frac{8}{10} \\ \\ 5 \times 10 = 8(x + 5) \\ \\ 50 = 8x + 40 \\ \\ 50 - 40 = 8x \\ \\ 10 = 8x \\ \\ \frac{10}{8} = x \\ \\ x = 1.25 \\ \\ \\ \frac{7}{y + 7} = \frac{8}{10} \\ \\ 7 \times 10 = 8(y + 7) \\ \\ 70 = 8y + 56 \\ \\ 70 - 56 = 8y \\ \\ 14 = 8y \\ \\ \frac{14}{8} = y \\ \\ y = 1.75$