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Bumek [7]
3 years ago
14

5/x=7/x-4 pls help me with this problem if u help i willl heart and follow you​

Mathematics
1 answer:
Sunny_sXe [5.5K]3 years ago
7 0

Answer:

5/x = 7/x-4

5(x-4) = 7(x)

5x - 20 = 7x

5x - 7x = 20

-2x = 20

x = -20/2 = -10

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Solve the following system. x2 + y 2= 25 2x + y = 10 The solution set
anzhelika [568]

Answer: {(5,0), (3,4)}

Step-by-step explanation:

You can apply the Substitution method:

- Solve for y from the second equation.

- Substitute into the first equation and solve for x.

Then:

y=10-2x

x^2+y^2=25\\x^2+(10-2x)^2=25\\

(Remember that: (a\±b)^2=a^2\±2ab+b^2)

x^2+(10^2-2(10)(2x)+(2x)^2)=25\\x^2+100-40x+4x^2=25\\5x^2-40x+75=0\\x^2-8x+15=0\\(x-5)(x-3)=0\\\\x=5\\x=3

Substitute the values obtained into one of the original equation and solve for y:

2(5)+y=10\\10+y=10\\y=0\\\\2(3)+y=10\\6+y=10\\y=4

The solution set is: {(5,0), (3,4)}

8 0
3 years ago
What is the distance between two points (1,6) and (8,4)
iogann1982 [59]
6,5 is two points to this equation
3 0
4 years ago
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Arelli drank 2 3 liter of water Monday before going jogging. She drank 5 7 liter of water after her jog. How much water did Arel
bearhunter [10]

We have been that Arelli drank 2/3 liter of water Monday before going jogging. She drank 5/7 liter of water after her jog. We are asked to find the amount of water that Arelli drink altogether.

To find the amount of water that Arelli drink altogether, we will add amounts of water drank before going to jogging and after the jogging.

\text{Amount of water that Arelli drink altogether}=\frac{2}{3}+\frac{5}{7}

Let us make a common denominator.

\text{Amount of water that Arelli drink altogether}=\frac{2\cdot 7}{3\cdot 7}+\frac{5\cdot 3}{7\cdot 3}

\text{Amount of water that Arelli drink altogether}=\frac{14}{21}+\frac{15}{21}

Now we will combine numerators.

\text{Amount of water that Arelli drink altogether}=\frac{14+15}{21}

\text{Amount of water that Arelli drink altogether}=\frac{29}{21}

\text{Amount of water that Arelli drink altogether}=1\frac{8}{21}

Therefore, Arelli drank 1\frac{8}{21} liters of water altogether.

4 0
3 years ago
sean lives about 15.5 miles from the airport which number rounds to 15.5 when ronded to nearest tenth
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16.0Answer:

Step-by-step explanation:

3 0
3 years ago
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What is -3/8 - (1/6)
Mrac [35]
Remove parentheses.

-3/8 -1/6

Find the Least Common Denominator (LCD) of 3/8, 1/6. In other words, find the Least Common Multiple (LCM) of 8,6.

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Make the denominators the same as the LCD.

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Simplify. Denominators are now the same

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Join the denominators

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Simplify

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