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3 years ago

Y=2x+1 x+y=7 pls help meeeeeeeee

Mathematics

2 answers:

Gala2k [10]3 years ago

5 0

Answer:

$y=2,\:x=\frac{5}{2}$

Step-by-step explanation:

$\begin{bmatrix}x+1\cdot \:x+y=7\\ y=2\end{bmatrix}$

x+1· x+2=7

Simplify x+1· x+2: 2x+2x+1· x+2

Add similar elements: x+1· x=2x=2x+2

2x+2=7[ 2x+2=7 ]

Isolate x for 2x+2=7: x=52 2x+2=7

Subtract 2 from both sides

2x+2−2=7−2

Simplify

2x=5

Divide both sides by 2

2x2 =52 Simplify

vlabodo [156]3 years ago

4 0

Answer:

$y = 2x + 1 \\ substitute \: for \: y \: in \: x + y = 7 \\ x + (2x + 1) = 7 \\ 3x = - 6 \\ x = - \frac{1}{2} \\ y = 2( - \frac{1}{2} ) + 1 \\ y = - 1 + 1 \\ y = 0$

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Step-by-step explanation:

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2 years ago

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atroni [7]

Answer:

This measure is just 0.17 standard deviations from the mean, so we should not be surprised.

Step-by-step explanation:

Normal probability distribution

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$Z = \frac{X - \mu}{\sigma}$

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$Z = 0.17$

This measure is just 0.17 standard deviations from the mean, so we should not be surprised.

7 0

3 years ago