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IceJOKER [234]
3 years ago
15

Find the value of x. If your answer is not an integer, express it in simplest radical form.​

Mathematics
1 answer:
LenaWriter [7]3 years ago
5 0

Step-by-step explanation:

4 \\  {x}^{2}  =  {16}^{2}  +  {14}^{2}  \\  {x}^{2}  = 256 + 196 \\  {x}^{2}  = 452 = 2 \sqrt{113}  = 21.26

5 \\  {x}^{2}  =  {8}^{2}  +  {15}^{2}  \\  {x}^{2}  = 64 + 225 \\  {x}^{2}  = 289 \\ x = 17

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Answer:

Step-by-step explanation:

11x+6 = 15x-26

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Drag the tiles to the correct boxes to complete the pairs. Match the systems of equations with their solutions.
Oksanka [162]

Answer:

See explanation for matching pairs

Step-by-step explanation:

Equations

(1)

x - y = 25

2x + 3y = 180  

(2)

2x - 3y = -5

11x + y = 550  

(3)

x - y = 19

-12x + y = 168

Solutions

(-17,-36)

(47, 33)

(51, 26)

Required

Match equations with solutions

(1) x - y = 25 and 2x + 3y = 180

Make x the subject in: x - y = 25

x = 25 + y

Substitute x = 25 + y in 2x + 3y = 180

2(25 + y) + 3y = 180

50 + 2y + 3y = 180

50 + 5y = 180

Collect like terms

5y = 180-50

5y = 130

Solve for y

y =26

Recall that: x = 25 + y

x = 25 + 26

x = 51

So:

(x,y) = (51,26)

(2)  2x - 3y = -5 and 11x + y = 550

Make y the subject in 11x + y = 550

y = 550 - 11x

Substitute y = 550 - 11x in 2x - 3y = -5

2x - 3(550 - 11x) = -5

2x - 1650 + 33x = -5

Collect like terms

2x  + 33x = -5+1650

35x = 1645

Solve for x

x = 47

Solve for y in y = 550 - 11x

y = 550 - 11 * 47

y = 550 - 517

y = 33

So:

(x,y) = (47,33)

(3)

x - y = 19  and -12x + y = 168

Make y the subject in -12x + y = 168

y = 168 + 12x

Substitute y = 168 + 12x in x - y = 19

x - 168 - 12x = 19

Collect like terms

x -12x = 168 + 19

-11x = 187

Solve for x

x = -17

Solve for y in y = 168 + 12x

y =168-12 *17

y =-36

So:

(x,y) = (-17,-36)

4 0
3 years ago
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Harlamova29_29 [7]

0

:

Step-by-step explanation:

3 0
2 years ago
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