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solniwko [45]
3 years ago
10

A) 2 / 7 + 3 / 7 = ? b) 5 / 8 + 7 / 8 = ? c) 2 / 3 - 1 / 2 = ?

Mathematics
1 answer:
sergeinik [125]3 years ago
8 0

Answer: A=5/7. B=3/2. C=1/6

D=3/5. E=14/11. G=5/7 H=3/2 I=1/6 j=3/5 K=14/11 L=7/8

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

We are given that speed of car A is equal to speed of car B.

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this means that speed of car A is given by:  \dfrac{x}{17} miles/minutes  ( since speed is defined as the ratio of distance and time).

Car B reaches its destination in 32 minutes.

This means that the speed of car B is given by: \dfrac{y}{32} miles/minutes

as speed of both cars are equal this means:

\dfrac{x}{17}=\dfrac{y}{32}------(1)

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on using equation (1) and (2) we have:

\dfrac{x}{17}=\dfrac{12+x}{32}\\  \\32x=17(12+x)\\\\32x=17\times12+17x\\\\32x-17x=17\times12\\\\15x=122\times17\\\\x=13.6

Hence the speed of car A is 0.8 miles/minutes  ( since x/17 is the speed of car A)

Speed of car B=0.8 miles/minutes.



8 0
4 years ago
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For this item, we represent the very original value or price of the given item by x such that increasing the retail price by 40 percent will give us 1.4x. Also, when the retail price of the item is reduced by 25 percent, we have.
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