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const2013 [10]
3 years ago
13

X-Y= 3 work out the value of 2x -2y

Mathematics
2 answers:
maw [93]3 years ago
3 0

Answer:

6

Step-by-step explanation:

Let x=4

Let y=1

4-1=3

8-2=6

LekaFEV [45]3 years ago
3 0
The answer is six (6)

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2(x - 3) + 9 = 3(x + 1) + X?​
kow [346]

Answer:

x = -X    OR     x = 0

Step-by-step explanation:

I don't know if the capital 'X' was a different variable, so I did both calculations.

2(x - 3) + 9 = 3(x + 1) + X

= 2x - 6 + 9 = 3x + 3 + X

= 2x + 3 = X + 3x + 3

= -x = X

= x = -X

2(x - 3) + 9 = 3(x + 1) + x

= 2x - 6 + 9 = 3x + 3 + x

= 2x + 3 = 4x + 3

= -2x = 0

= x = 0

5 0
3 years ago
Find the nonpermissible replacement for y in this expression y-7/y+9
Vesnalui [34]

Answer:

y ≠ - 9

Step-by-step explanation:

the denominator of the expression cannot equal zero as this would make the expression undefined. Equating the denominator to zero and solving gives the value that y cannot be

solve y + 9 = 0 ⇒ y = - 9 ← not permissable


5 0
3 years ago
Express the recurring decimal 0.142 as a fraction in its simplest form ​
fgiga [73]

Answer:

142/999

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
7×10 to the power of -5 in standard notation! <br> Please include an explanation! <br> Thank you!
ivolga24 [154]
.00007

If it is to the negative power, you live the decimal point to the left (if positive, move to the right). In the case we move the decimal point 5 places to the left of 7. This results in .00007.

5 0
3 years ago
Read 2 more answers
Carly has 168 markers,
Margarita [4]

Answer:

2016 markers

Step-by-step explanation:

168

x 12

-------

2016

5 0
3 years ago
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