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Lady_Fox [76]
3 years ago
13

A-b

Mathematics
2 answers:
Lynna [10]3 years ago
6 0

Answer:

\boxed{\sf d. \ \frac{a}{b}  =  \frac{10}{7}}

Step-by-step explanation:

\sf \implies \dfrac{a - b}{b}  =  \dfrac{3}{7}  \\  \\  \sf \implies  \frac{a}{b}  -  \frac{b}{b}  =  \frac{3}{7}  \\  \\  \sf \implies  \frac{a}{b}  - 1 =  \frac{3}{7}  \\  \\  \sf \implies  \frac{a}{b}  - 1 + 1 =  \frac{3}{7}  + 1 \\  \\  \sf \implies  \frac{a}{b}  =  \frac{3}{7}  + 1 \\  \\  \sf \implies  \frac{a}{b}  =  \frac{3}{7}  +  \frac{7}{7}  \\  \\  \sf \implies  \frac{a}{b}  =  \frac{3 + 7}{7}  \\  \\  \sf \implies  \frac{a}{b}  =  \frac{10}{7}

adelina 88 [10]3 years ago
4 0

Answer:d

Step-by-step explanation:b=7

a-b=3

=>a=3+7

a=10

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Part 1
Let:
y be the total cost
x be the number of tickets
a be fair admission

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y = 1.25x + a

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y - 8 = 4(x - 9) \\ y = 4x - 36 + 8 \\ y = 4x - 28
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