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Ksivusya [100]
3 years ago
7

Which ordered pair in the form (x,y) is a solution of this equation?

Mathematics
1 answer:
qwelly [4]3 years ago
7 0
D
7•4 =28, -5•0 =0... 28+0=28
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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
gizmo_the_mogwai [7]

Answer:

The large sample n = 1713.96

Step-by-step explanation:

<u>Explanation</u>:-

given the population proportion was estimated to be 0.22

population proportion (P) = 0.22

The 95 % level of significance = 1.96≅ 2

The margin of  error = 0.02

The formula of margin error

                                   \frac{2\sqrt{p(1-p)} }{\sqrt{n} } = 0.02    …  ( i )

Substitute 'p' values in equation (1)

\frac{2\sqrt{0.22(1-0.22)} }{\sqrt{n} } = 0.02

cross multiplication and simplification, we get

2X0.414= 0.02 \sqrt{n}

\frac{2X0.414}{0.02} = \sqrt{n}

41.4 = \sqrt{n}

squaring on both sides, we get

the large sample n = 1713.96

7 0
3 years ago
Lines CD and CE are tangent to circle a. If m∠DAE = 130°, what is the measure of ∠DCE? Tangent CD intersects with circle A at po
inna [77]

The answer is 50º

Step-by-step explanation:

It is the correct and only plausable answer.

5 0
2 years ago
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butalik [34]
17, you only have to add up a few because of the x and y placements. Hope this helps you :)
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Function: y=x2+5x−7<br><br><br>Vertex: ( , )<br><br><br>Solutions: ( , ) and ( , )
Dima020 [189]

Answer:

vertex : (-5/2, -53/4)

solutions: (-(5-sqrt53)/2, 0) (-(5+sqrt53)/2, 0)

Step-by-step explanation:

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1 year ago
What is the distance between –125 and 78?
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The disstance between -125 and 78 is 47
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