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arlik [135]
3 years ago
5

10 less than a number is the same number doubled. What is the number?

Mathematics
1 answer:
slega [8]3 years ago
5 0

Answer:

-10

Step-by-step explanation:

Let x = number

10 less than a number is the same number doubled

x-10 = 2x

Subtract x from each side

x-10-x = 2x-x

-10 = x

The number is -10

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X =4<br> x+y=-6<br> 4x - 3y + 2z = 26
slega [8]

Answer:

x = 4 ,y = -10 , z = -10  

Step-by-step explanation:

Solve the following system:

{y + 4 = -6 | (equation 1)

16 - 3 y + 2 z = 26 | (equation 2)

Express the system in standard form:

{y+0 z = -10 | (equation 1)

-(3 y) + 2 z = 10 | (equation 2)

Swap equation 1 with equation 2:

{-(3 y) + 2 z = 10 | (equation 1)

y+0 z = -10 | (equation 2)

Add 1/3 × (equation 1) to equation 2:

{-(3 y) + 2 z = 10 | (equation 1)

0 y+(2 z)/3 = (-20)/3 | (equation 2)

Multiply equation 2 by 3/2:

{-(3 y) + 2 z = 10 | (equation 1)

0 y+z = -10 | (equation 2)

Subtract 2 × (equation 2) from equation 1:

{-(3 y)+0 z = 30 | (equation 1)

0 y+z = -10 | (equation 2)

Divide equation 1 by -3:

{y+0 z = -10 | (equation 1)

0 y+z = -10 | (equation 2)

Collect results:

Answer: y = -10 , z = -10

6 0
3 years ago
What múltiples to 70 and adds to 19
Cloud [144]

5 and 14

5* 14 = 70

5 + 14 = 19


5 0
3 years ago
Read 2 more answers
PLEASE HELP!!!!!!! I NEED HELP!!!!!!!!!!
miss Akunina [59]

Answer:

342in

Step-by-step explanation:

7 0
3 years ago
Cary and his brother took a road trip together. The total number of miles they drove was more than 200. Cary drove for 50 miles.
Brilliant_brown [7]

Answer:

Step-by-step explanation:

The trick is not to include anything under and including 150 miles. So A B and C are not to be checked.

D and E are both true.

5 0
3 years ago
Read 2 more answers
What’s the area of the triangle??
viktelen [127]
Note that one side is 20 ft, and the other is 16.

This means that the side that is part of the triangle is 4 ft.

The measurement is still the same for the triangle's height.

Find the area of the rectangle:
24 x 16 = 384
Find the area of the triangle:
4 x 24 = 96

Add the two numbers together:

384 + 96 = 480

You're answer is (C)

hope this helps
5 0
3 years ago
Read 2 more answers
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