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Nostrana [21]
3 years ago
13

Y=7x+3 7x-6y=-18 substitution

Mathematics
2 answers:
Lynna [10]3 years ago
6 0

Answer:

x=0

y=3

Step-by-step explanation:

y =7x+3       equation 1

7x-6y=-18   equation 2

using equation 1 in equation 2 we have:

7x-6(7x+3)= -18

7x -42x -18 = -18

-35x -18 = -18

-35x = -18 +18

-35x=0

x=0

so we have:

y =7x+3  

y= 7(0) +3

y = 3

Andre45 [30]3 years ago
3 0

Answer:

y=3

x=0

Step-by-step explanation:

we have the following system of equations:

y=7x+3\\7x-6y=-18

the substitution method requires that we take one of the variables of one equation, and substitute that value in the other equation.

in this case taking advantage of the fact that in the first equation the value of y is already cleared, we substitute it in the second equation:

7x-6(7x+3)=-18

and then we solve for x:

7x-42x-18=-18\\-35x-18=-18\\-35x=-18+18\\-35x=0\\x=0

and since x=0 substituting this into the first equation of the system to find the value of y:

y=7(0)+3\\y=3

the answer is y=3 and x=0

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Step-by-step explanation:

multiply 4 and 3

x^4*3 = x^12

4 0
3 years ago
There are 24 boys and 16 girls in a hall, each holding coins in their hand.
Dmitry_Shevchenko [17]

Answer:

27

Step-by-step explanation:

total=average ×no.

18×40=720 the no. of coins for all children

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3 years ago
Morgan had $1,679 in her savings account. After one year, her balance increases by 2%. How
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7 0
2 years ago
Read 2 more answers
Please help and thank you!
Stolb23 [73]

The conversion is

x =  r \cos \theta

y = r \sin \theta

So

\dfrac y x = \tan \theta

We're given the fairly unusual

\theta = -\frac 5 2

It's fairly unusual because usually an angle is given in degrees or radians, and typically the radians are a fraction times pi. We'll assume radians.

\dfrac y x = \tan \theta = \tan(-5/2) \approx 0.747

Ah, there's our .75. The approximate answer is

y = 0.75 x

Third choice.

The exact answer is

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also a line through the origin.

3 0
3 years ago
Please anyone help me The measure of an angle is five times the measure of its supplementary angle. What is the measure of each
Radda [10]

Answer:

150 and 30

Step-by-step explanation:

Hello!

Supplementary angles are angles that when added up equal 180

Which can be shown by

x + x = 180

Since one has to be 5 times bigger we put a 5 in front of one of the x's

5x + x = 180

5x is an angle and x is the other

Now we solve for x

5x + x = 180

Combine like terms

6x = 180

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Now we put that into each angle

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30

The answer is 150 and 30

Hope this Helps!

5 0
3 years ago
Read 2 more answers
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