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Ede4ka [16]
3 years ago
10

Solve the following system of equations for all three variables.

Mathematics
1 answer:
Semenov [28]3 years ago
5 0

Answer:

x=2, z=4, y=-6

Step-by-step explanation:

Add

<u>-9x-y+2z= -4</u>

<u>-6x+y+5z= 2</u>

-9x-6x is -15x

-y+y is 0

2z+5z is 7z

-4+2 is -2

So the equation now looks like this: -15x+7z=-2

Subtract

<u>-6x+y+5z= 2</u>

<u>-4x+y+5z= 6</u>

So the equation will look like this:

<u>-6x+y+5z= 2</u>

<u>-(-4x+y+5z= 6)</u>

-6x+4x is -2x

y-y is 0

5z-5z is 0

2-6 is -4

So the equation now looks like this: <u>-2x=-4</u>

You can find x by dividing -2 on both sides:

<u>x=2 </u>

So 2 is x

Now you can substitute x into 2

-15(2)+7z=-2

-30+7z=-2

7z=28

Divide 7 on both sides:

<u>z=4</u>

So now you can substitute z into 4 (For any of the three equation)

-4(2)+y+5(4)=6

-8+y+20=6

20 minus 8 is 12

y+12=6

Subtract 12 on both sides:

y=-6

So the answers are

x=2, z=4, y=-6

Hope this helps!

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d1i1m1o1n [39]

<u>Given</u>:

The given expression to find the nth term of the sequence is d(n)=d(n-1) \cdot (-5)

The first term of the sequence is d(1)=8

We need to determine the third term of the sequence.

<u>Second term:</u>

The second term of the sequence can be determined by substituting n = 2 in the nth term of the sequence.

Thus, we have;

d(2)=d(2-1) \cdot (-5)

d(2)=d(1) \cdot (-5)

d(2)=8 \cdot (-5)

d(2)=-40

Thus, the second term of the sequence is -40.

<u>Third term:</u>

The third term of the sequence can be determined by substituting n = 3 in the nth term of the sequence.

Thus, we have;

d(3)=d(3-1) \cdot (-5)

d(3)=-40 \cdot (-5)

d(3)=120

Thus, the third term of the sequence is 120.

7 0
3 years ago
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Find the remainder for the quotient using either substitution or synthetic division.
zaharov [31]

(x - 5) is a factor of the polynomial function f(x) = x³ - x² - 17x -15 as there is no remaider.

<h3>What is a factor of a polynomial?</h3>

We know that if x = a is one of the roots of a given polynomial x - a = 0 is a factor of the given polynomial.

To confirm if x - a = 0 is a factor of a polynomial we replace f(x) with f(a) and if the remainder is zero then it is confirmed that x - a = 0 is a factor.

Given a polynomial function f(x) = x³ - x² - 17x -15.

If (x - 5) is it's factor then f(5) = 0.

∴ f(x) = x³ - x² - 17x -15.

f(5) = 5³ - 5² - 17(5) - 15.

f(5) = 125 - 25 - 85 - 15.

f(5) = 0.

So, the remainder is zero hence (x - 5) is a factor of the polynomial function f(x) = x³ - x² - 17x -15.

learn more about factor of a polynomial here :

brainly.com/question/26354419

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7 0
1 year ago
represents a line that passes through (3, –2) with a slope of negative StartFraction 4 Over 5 EndFraction?
erik [133]

Answer:

y =  \frac{4}{5} x -  \frac{22}{5}

Step-by-step explanation:

y = mx + b

- 2 =  \frac{4}{5} (3)  + b \\  - 2 =  \frac{12}{5}  + b \\  - 2 -  \frac{12}{5}  = b \\   - \frac{10}{5}  -  \frac{12}{5}  = b \\  -  \frac{22}{5}  = b

Therefore, the equation of the line that goes through point (3, -2)and has slope ⅘ is

y =  \frac{4}{5} x  -  \frac{22}{5}

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3 years ago
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The answer to this question is B
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Jason is 5 foot 11 inches tall. Amy is 63 inches tall. Who's taller and by how much 1 foot = 12 inches
jok3333 [9.3K]
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And 71 in -63 in= 8 in.
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