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Mamont248 [21]
3 years ago
7

Solve the following system of equations algebraically. x + 2y = 18 y = x-3 X= y =

Mathematics
2 answers:
ivolga24 [154]3 years ago
7 0

Answer:

x + 2y - 18 =0

y = x - 3 is x = 3

Step-by-step explanation:

finlep [7]3 years ago
5 0
You plug in the equation of y into x.
X+2(x-3)=18
Gives you the answer of, x = 8
Then you plug in x which is 8 Into the equation of y.
So, y = 8-3
Which gives you
Y = 5
The answer is
X = 8
Y = 5
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Please help me figure this out.
xz_007 [3.2K]

Answer:

Quotient: x+7

Remainder: -2

Step-by-step explanation:

Divide the terms (x² ÷ x =x)↓

(x² + 11x + 26) ÷ (x + 4) =x

Subtract x² + 4x (You have to the sign if each term)

(x² + 11x + 26) ÷ (x + 4) =x

-x² - 4x

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

      7x + 26      

Divide the terms (7x ÷ x = 7)

x² + 11x + 26) ÷ (x + 4) =x + 7

Multiply the quotient by the dividend (x + 4) × 7 = 7x+28

(x² + 11x + 26) ÷ (x + 4) =x

-x² - 4x

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

      7x + 26      

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4 0
3 years ago
The distribution of scores on a recent test closely followed a Normal Distribution with a mean of 22 points and a standard devia
maksim [4K]

6.68% of the students scored at least 19 points on this test while the 85 percentile has a test score of 24.08 points

The z score is used to determine by how many standard deviations the raw score is above or below the mean. The z score is given by:

z=\frac{x-\mu}{\sigma} \\\\where\ \mu=mean.\sigma=standard\ deviation, x=raw\ score\\\\Given\ that\ mean(\mu)=22,standard \ deviation (\sigma)=2\\\\For\ x>19:\\\\z=\frac{22-19}{2}=1.5

P(x > 19) = P(z > 1.5) = 1 - P(z < 1.5) = 1 - 0.9332 = 0.0668

6.68% of the students scored at least 19 points on this test

b) 85 percentile corresponds to a z score of 1.04

z=\frac{x-\mu}{\sigma}\\\\1.04 =\frac{x-22}{2} \\\\2.08=x-22\\\\x=24.08

The 85 percentile has a test score of 24.08

Find out more at: brainly.com/question/25012216

7 0
3 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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