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Ghella [55]
3 years ago
11

Three-quarter the product of two numbers x and y, what is the algebriac expression?​

Mathematics
1 answer:
Yakvenalex [24]3 years ago
3 0

Answer:

x+y=3/4

Step-by-step explanation:

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Step-by-step explanation: You subtract b from one side to the other, and then do the same with y

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A money box contains only 10-cent
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Answer:

Number of 10 cents = 18

Number of  20 cents = 10

Step-by-step explanation:

Let number of 10 cents be = x

Let number 20 cents be = y

Total number of coins = x + y = 28  -------- ( 1 )

Total amount in the box = 0.10 x + 0.20y = 3.80 ---------- ( 2 )

<em><u>Solve the equations to find x and y</u></em>

( 1 ) => x + y = 28

         x = 28 - y

Substitute x in ( 2 )

( 2 ) => 0.10(28 - y) + 0.20y = 3.80

          2.80 - 0.10y + 0.20y = 3.80

            0.10 y = 3.80 - 2.80

            0.10 y = 1.00

                y = \frac{1}{0.10} = 10

                y = 10

Substitute y in ( 1 ) => x + y = 28

                                x + 10 = 28

                                x = 28 - 10

                                x = 18

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A test driver has to drive a car on a 1-mile track for two rounds in a way, that his average speed is 60 mph. On his first round
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