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NikAS [45]
2 years ago
10

What valie of x makes the equation true​

Mathematics
1 answer:
Arada [10]2 years ago
3 0

Answer:

x = 1.25

Step-by-step explanation:

-3x+10 = 5x-8

+3x        +3x

10 = 8x - 8

+8           +8

18 = 8x

x = 18/8

x = 1 1/4 = 1.25  

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Plz help and show how you did the math question
Nikitich [7]

Answer:

x =  - 3

y =  - 2

Step-by-step explanation:

Since y=x+1 plug it into bottom equation as y.

x + 1= 5x + 13

Subtract 1 from both sides

x = 5x + 12

Subtract 5x from both sides

- 4x = 12

Divide both sides by -4

x =  - 3

Now x=-3 into the top equation to find y

- 3 + 1 =  - 2

y=-2

8 0
2 years ago
For a set of five whole numbers, the mean is 4, the mode is 1, and the median is 5. What are the five numbers?
zmey [24]
SO we need 5 numbers that equal to 20, with 5 being the middle number, and ones being the most used number so

1 1 5 x y

According to this, x and y must equal 13 and both be bigger then 5. Because we can rule out every other number, x and y must be 6 and 7.

Your 5 numbers are 1, 1, 5, 6, 7.
5 0
2 years ago
Find the exact value by using a half-angle identity.<br><br> tan seven pi divided by eight
murzikaleks [220]

9514 1404 393

Answer:

  1 -√2

Step-by-step explanation:

  \tan(x/2)=\dfrac{1-\cos(x)}{\sin(x)}\\\\\tan\left(\dfrac{1}{2}\cdot\dfrac{7\pi}{4}\right)=\dfrac{1-\cos\dfrac{7\pi}{4}}{\sin\dfrac{7\pi}{4}}=\dfrac{1-\dfrac{1}{\sqrt{2}}}{-\dfrac{1}{\sqrt{2}}}=\boxed{1-\sqrt{2}}

tan(7π/8) = 1 -√2

7 0
3 years ago
If you add or subtract two rational numbers, is the result sometimes, always, or never rational?
lawyer [7]

Answer:

Always

Step-by-step explanation:

8 - 9 = -1

1/3 - 1/6 = 1/6   are 2 examples

8 0
3 years ago
GIVING 20 POINTS PLS HELP!!!
ser-zykov [4K]

Answer:

The answer is C. -336

Step-by-step explanation:

All you have to do is 25 - 39 = -14 x 24 = -336

Hope this helps :)

4 0
3 years ago
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