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geniusboy [140]
3 years ago
6

If x = 2/9 and y = 3/7 work out the value of x + y

Mathematics
2 answers:
faltersainse [42]3 years ago
8 0

Answer:

\boxed{\sf \dfrac{41}{63}}

Step-by-step explanation:

hi, it means that we have to compute

\dfrac{2}{9}+\dfrac{3}{7}=\dfrac{7*2+3*9}{7*9}=\dfrac{14+27}{7*9}=\dfrac{41}{63}

sattari [20]3 years ago
6 0

Answer:

\frac{41}{63}

Step-by-step explanation:

=> x+y

Putting x = \frac{2}{9} ; y = \frac{3}{7}

=> \frac{2}{9} +\frac{3}{7}

<u><em>LCM = 63</em></u>

<em>This will make the expression</em>

=> \frac{14+27}{63}

=> \frac{41}{63}

<em>This is the required factorized form</em>

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Solve the following system of equations using substitution.<br><br> 4x + 2y = 12<br> x = y + 3
BigorU [14]

Answer:

x = 3

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Step-by-step explanation:

The method of substitution is when one solves an equation for one of the variables, and then substitutes the expression into the other equation. After doing so, one will solve the other equation for the remaining variable and then backsolve for the first variable.

4x + 2y = 12

x = y + 3

The second equation is already sovled for parameter (x), subttiute this into the other equation,

4(y + 3) + 2y = 12

Distribute,

4y + 12 + 2y = 12

Simplify,

6y + 12 = 12

Inverse operations,

6y + 12 = 12

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6y = 0

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Backsolve for (x), substitute the value of (y) into the equation for (x) and solve,

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3 years ago
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Find the solution to the system of equations -3x-9y=18 4x+3y=12
chubhunter [2.5K]

Answer:

(6,-4)

Step-by-step explanation:

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multiply equation 2 by 3, and add it to equation 2

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-----------------

X's cancel out

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Plug in 6 for x in any of the original equations

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Answer:

Step-by-step explanation:

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