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Brut [27]
3 years ago
9

If x-2y=1 and 2x+3y=9 then what is x

Mathematics
1 answer:
yan [13]3 years ago
6 0
The first one is x=2y plus one.
The second one is

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At the school pay students can attend for only $7, but for aduts it costs $10
svp [43]

Answer:

question? I don't understand

5 0
3 years ago
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What is the area of the triangle?<br> 24<br> 10<br> 26<br> units 2 HELP PLEASE
fgiga [73]
A=1/2x Base x Height

= 1/2 (10)(24)

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5 0
2 years ago
The sum of 3 times a number and 7 is 25
hammer [34]

Mathematically written:

3 * x + 7 = 25

3x + 7 = 25

3x = 25 - 7

3x = 18

x = 18 / 3

x = 6



Proof:

3 * 6 + 7 = 25

18 + 7 = 25

25 = 25 → both sides of the equation are equal, our answer is correct



Notes:

A number - Is an unknown number, called a variable, which in this case is substituted by the letter x.





Hope it helped,




BioTeacher101


5 0
3 years ago
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Tom has twice as many marbles as luke. together they have 39 marbles. how many marbles does tom have?
irga5000 [103]
Tom has 26 marbles total. 
3 0
3 years ago
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HELP ME PLEASE I NEED HELP​
Olin [163]

Step-by-step explanation:

You should prolly subtract 2 from both sides first.

So you get, -|2/5x + 3| > -1 2/5

  • Add three to both sides
  • -|2/5x| = -1 2/5
  • Do -1 and 2/5 divided by 2/5 to get -3.5, x > -3.5

One of the answers is x > -3.5 but you need to switch the sign to less than and make the other side the opposite.

-( \frac{2}{5}x + 3 ) < 1 \frac{2}{5}

You see that, switched the sign and made whats on the right side opposite. So now solve for x again but with this new equation. Also, the parentheses are absolute value signs

Subtract 3 from both sides

-|2/5x| < -1 and 3/5

Divide 2/5 from each side to get x < -4

I hope I'm correct, my bad if I'm wrong

6 0
3 years ago
Read 2 more answers
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