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dimaraw [331]
3 years ago
12

Solve the equation for y. Then find the value of Y for each value of X.

Mathematics
2 answers:
Nataliya [291]3 years ago
6 0

Step-by-step explanation:

<h3>y + 7x = 9 </h3>

<h3>y = 9 - 7x , (x = - 1) </h3><h3>y = 9 - 7 (-1)</h3><h3>y= 9 - (-7)</h3><h3>y = - 16</h3>

<h3>y = 9 - 7x , (x = 0)</h3><h3>y = 9 - 7(0) </h3><h3>y = 9 - 0</h3><h3>y = 0</h3>

<h3>y= 9 - 7x , (x = 2) </h3><h3>y = 9 - 7 (2) </h3><h3>y = 9 - 14</h3><h3>y = - 5</h3>

ʕ •ᴥ•ʔ

<h3 />
Hunter-Best [27]3 years ago
4 0

Answer:

y=9-7x

If x= -1, y=16

If x= 0, y=9

If x=2, y= -5

Step-by-step explanation:

Because you are solving the equation for y, you want to have y by itself on one side. The only way to do that in this problem is by subtracting the 7x on both sides.

y+7x=9

-7x -7x ---> y=9-7x

The next part of the question says to find the value of Y for each value of X. Using the given X values, we plug them into the equation we just got in order to find Y.

y=9-7(-1) ----> y=16

y=9-7(0) ----> y=9

y=9-7(2) ----> y=-5

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#Volume of the golf ball:

V=\frac{4}{3}\pi r^3\\\\=\frac{4}{3}\pi \times 4^3\\\\\approx 268.08\ cm^3

#The volume of the water in the glass:

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We then equate the two volumes to the glass' volume to determine the new height of the water:

V=\pi r^2h\\\\(206.08+50.27)=\pi r^2 h\\\\h=318.35/(\pi \times 4^2)\\\\=6.33\ cm

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3 years ago
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Step-by-step explanation:

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Answer:

Step-by-step explanation:

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Please help with math question
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1- Solution using graphs:
Take a look at the attached images.
The red graph represents the first given function while the blue graph represents the second given function.
We can note that the two graphs are the same line (they overlap).
This means that any chosen point on one of them will satisfy the other.
This means that there are infinite number of solutions to these two equations.

2- Solution using substitution:
The first given equation is:
y = -5x + 3 ...........> equation I
The second given equation is:
2y + 10x = 6 ...........> equation II

Substitute with I in II and solve as follows:
2(-5x+3) + 10x = 6
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0 = 0
This means that there are infinitely many solutions to the given system of equations.

Hope this helps :)

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