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lorasvet [3.4K]
3 years ago
6

Enter a rational number that is equivalent to −20/4

Mathematics
1 answer:
AleksandrR [38]3 years ago
6 0

Answer:

it may be wrong but this is what i think...

-80/16

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Solve using system of equations by using elimination method for -5x+4y=2 ; 9x-4y=6
jek_recluse [69]

Answer:

y = 3

x = 2

Step-by-step explanation:

-5x + 4y = 2

9x - 4y = 6

Sum both eq.

-5x + 9x = 4x

+4y - 4y = 0

2 + 6 = 8

then:

4x + 0 = 8

4x = 8

x = 8/4

x = 2

from the first eq.

-5x + 4y = 2

-5*2 + 4y = 2

-10 + 4y = 2

4y = 2 + 10

4y = 12

y = 12/4

y = 3

Check:

from the second eq.

9x - 4y = 6

9*2 - 4*3 = 6

18 - 12 = 6

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2 years ago
The base of a pyramid has n sides.<br> Write an EXPRESSION for the number of faces of the pyramid.
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<span>In general, if the pyramid has 'x' sides, then it will have 'x' lateral faces. Total Number of Faces = Number of Base Faces + Number of Lateral Faces. Total Number of Faces = 2 + x. So the formula is F=x%2B2 where "x" is the number of sides that the pyramid has and "F" is the total number of faces.</span>
3 0
3 years ago
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An athlete runs every day for one week. The following week she runs one mile further than she ran on that day the previous week.
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Answer:

Buy $HBAR

Step-by-step explanation:

You can find it on exchanges like Bittrex, Voyager, Uphold, and soon enough Coinbase!

5 0
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Ms. Mincey wants to spend less than $80 on presents for her 2 brothers. What is the most amount of money she can spend on each o
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Jay sells 10 packs of apples for 80p. He wants to make £75 at the end of the year. How many packs of apples does he need to sell
ipn [44]

Answer:

937.5 packs of apples

Step-by-step explanation:

Note that:

100p = £1

80p = x

Cross Multiply

100x = 80p × £1

x = 80/100

x = £0.8

Jay sells 10 packs of apples for 80p.

Hence:

£0.8 = 10 packs of apples

£75 = x

Cross Multiply

£0.8 × x = £75 × 10 Packs

x = £75 × 10 Packs/£0.8

x = 937.5

Therefore, to make £75 at the end of the year, he has to sell 937.5 packs of apples

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2 years ago
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