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Whitepunk [10]
3 years ago
10

X=3 5x+4y=-9 -x+4y-2z=-25

Mathematics
1 answer:
Alexandra [31]3 years ago
5 0

Answer:

y=-6 z=-1

Step-by-step explanation:

5(3)+4y=-9

15+4y=-9

-15. -15

4y=-24

/4. /4

y=-6

-x+4y-2z=-25

-3+4(-6)-2z=-25

-3+-24-2z=-25

-27-2z=-25

+27. +27

-2z=2

/-2. /-2

z=-1

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Help me ASAP please
Harrizon [31]

Answer:

\large\boxed{7^{-8}}

Step-by-step explanation:

7^{-1}\cdot7^{-7}\qquad\text{use}\ a^n\cdot a^m=a^{n+m}\\\\=7^{-1+(-7)}=7^{-8}

6 0
3 years ago
The volume of a paint can is 215 in. If the height of the cam is 7.5 in, what is the radius to the nearest whole number?
kati45 [8]

formula for volume = V=PI x r^2 x H so replace letters with known values and work the problem out

215 in.^3 = 3.14 x r^2 x 7.5


215/(7.5x3.14) =  r^2/(7.5 x 3.14)


r^2 = (215/7.5x3.14) 

r^2 = 9.1295

Now, taking the square root of both sides, we get:

sqrt(r^2) = r

 sqrt(9.1295) = 3.021 

 r = 3 inches


3 0
3 years ago
Read 2 more answers
What is the answer of 9k multiply by 9 polynomials​
navik [9.2K]

Answer:

this is what i found

Step-by-step explanation: Multiply k and 9

Multiply k and 1

The k just gets copied along.

The answer is k

k

9*k evaluates to 9k

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Multiply the m and k

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The m just gets copied along.

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Multiply u and mk

The u just gets copied along.

The m just gets copied along.

The k just gets copied along.

The answer is umk

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9*k*m*u evaluates to 9umk

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The answer is lumk

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T

6 0
3 years ago
Read 2 more answers
How would i graph the solution set for 1/3x (greater than or equal to) y+2?
Leto [7]
1/3x ≥ y + 2

You’ll have to transform the equation into its slope-intercept form, y = mx + b, so that you could graph the line. Set y to “=“

1/3x = y + 2
Subtract 2 from both sides

1/3x -2 = y + 2- 2

1/3x - 2 = y or y = 1/3x - 2

Next, to graph the solid line, you need at least two points to plot. We can start with the y-intercept, (0, -2). Another point to use is the x-intercept. To solve for the x-intercept, (a, 0), set y = 0:

0 = 1/3x - 2
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0 + 2 = 1/3x - 2 + 2
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Multiply both sides by 3 to solve for x:
2(3) = (3) 1/3x

6 = x

Therefore, the x-intercept = (6,0).

Plot the intercepts on the graph and connect those two points to create line.

Next, to identify which half-plane region to shade, choose a convenient test point (not on the line) to see whether it part of the solution. We could use the point of origin, (0, 0). Substitute its values into the linear inequality:

1/3x ≥ y + 2

1/3(0) ≥ (0) + 2
0 ≥ 2 (false statement). Therefore, you must shade the half-plane region where it doesn’t contain the test point, (0, 0).

Attached is the graph where it shows that the shaded lower half-plane region.

Please mark my answers as the Brainliest if you find my explanations helpful :)

6 0
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Anarel [89]
Both A and B will be answers to the solution. 

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a = 1 (number attached to the x^2)
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\frac{-b +/-  \sqrt{ b^{2} -4ac } }{2a}

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\frac{3 +/- \sqrt{-11 } }{2}
6 0
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