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AlekseyPX
3 years ago
6

Help help help Help help

Mathematics
1 answer:
kipiarov [429]3 years ago
7 0

Answer:

x = 2, y = 4

Step-by-step explanation:

x + \frac{3}{4} y = 5 ( multiply through by 4 to clear the fraction )

4x + 3y = 20 → (1)

x - \frac{1}{2} y = 0 ( multiply through by 2 to clear the fraction )

2x - y = 0 → (2)

Multiplying (2) by 3 and adding to (1) will eliminate y

6x - 3y = 0 → (3)

Add (1) and (3) term by term to eliminate y

10x + 0 = 20

10x = 20 ( divide both sides by 10 )

x = 2

Substitute x = 2 into either of the 2 equations and solve for y

Substituting into (1)

4(2) + 3y = 20

8 + 3y = 20 ( subtract 8 from both sides )

3y = 12 ( divide both sides by 3 )

y = 4

Solution is x = 2, y = 4

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Pleeeeez help thank you
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Answer:

C

Step-by-step explanation:

The book at store A is $13.

5% tax means you pay 5 cents extra per dollar.

13*5= 65.

So so far your total is $13.65

The shipping fee is $3

$3+$13.65= $16.65

The book at store B is 15% off, with no extra charge

%15 of $19 is 2.85.

19-2.85 is 16.15

pls brainliest

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7 0
3 years ago
Read 2 more answers
Solve. Don't forget the $ sign! *
Leno4ka [110]

Answer:

$3, 661.60

Step-by-step explanation:

1703.44 + 1958.16

5 0
3 years ago
IF YOU ARE GOOD AT GEOMETRY THAN COME HERE TO PICK UP YOUR POINTS!!!!
katen-ka-za [31]
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6 0
4 years ago
I need help with #2
andrew-mc [135]

Answer:

28 < x < 114

Step-by-step explanation:

  • x cannot be larger than or even equal to 71 + 43 = 114. So it must be less than 114.
  • But there are limits on the other end as well. 43 +x > 71, otherwise you won't have a triangle. so you have to solve that inequality as well
  • 43 + x > 71            Subtract 43 from both sides.
  • 43-43 + x > 71 - 43
  • x > 28
  • To put this in the form of the answer you need it looks like this.
  • 28 < x < 114
5 0
4 years ago
168 is what per cent of 420
vagabundo [1.1K]

Answer:

<u>40%</u>

Step-by-step explanation:

Working out percentages

168 of 420 can be written as:

168 /420

420

To find percentage, we need to find an equivalent number with denominator 100. Multiply both numerator & denominator by 100

=(168/420)*(100)

= <u>40 /100 </u>

Therefore, the answer is <u>40% </u>

If you are using a calculator, simply enter 168÷420×100 which will give you 40 as the answer.

7 0
3 years ago
Read 2 more answers
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