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aliina [53]
3 years ago
11

(Solve by Graphing)

Mathematics
2 answers:
stira [4]3 years ago
7 0

Answer

3x-2y=4

x+y=-7

This is the answer and the link has the graph

Download pdf
lapo4ka [179]3 years ago
6 0

Answer:(2,-9)

Step-by-step explanation:

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Hope this helps! This is system of equations.

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The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the e
marusya05 [52]

Answer:

The estimation for the proportion of tenth graders reading at or below the eighth grade level is given by:

\hat p =\frac{955-812}{955}= 0.150

0.150 - 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.131

0.150 + 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.169

And the 90% confidence interval would be given (0.131;0.169).

Step-by-step explanation:

We have the following info given:

n= 955 represent the sampel size slected

x = 812 number of students who read above the eighth grade level

The estimation for the proportion of tenth graders reading at or below the eighth grade level is given by:

\hat p =\frac{955-812}{955}= 0.150

The confidence interval for the proportion  would be given by this formula

\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}

For the 90% confidence interval the significance is \alpha=1-0.9=0.1 and \alpha/2=0.05, with that value we can find the quantile required for the interval in the normal standard distribution and we got.

z_{\alpha/2}=1.64

And replacing into the confidence interval formula we got:

0.150 - 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.131

0.150 + 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.169

And the 90% confidence interval would be given (0.131;0.169).

8 0
3 years ago
Miss Fallon wants to paint her classroom door in a checkerboard pattern. The door measures 96 inches in length and 36 inches in
algol13

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if u need a explenation you can ask me

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2 years ago
What is 6 plus 6x-20 over x^2-×
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Simplify 2x+6=4x+-2 reorder the terms 6+2x=4x+-2
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3 years ago
The length of a rectangle is twice its width.<br> The perimeter of the rectangle is 126 feet.
seraphim [82]

Answer: Length = 42ft Width = 21ft

Step-by-step explanation:

Let "w" be width

W = 21ft

w x 2 = L

L = 42ft

Perimeter:

42+42+21+21

=126

8 0
2 years ago
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