3 years ago

Help pls asap!!!!!!! brainliest!!!!!!

Mathematics

2 answers:

Free_Kalibri [48]3 years ago

8 0

Answer:

ANSWER IS C= 1/4X^2-x+4

Step-by-step explanation:

The solving is pretty easy but i like to go on "m a t h w a y" for the original equation that the problem is asking, and then find the answer on

"m a t h w a y" And then type in the other equation choices (a,b,c,d) and find which one has the same graph or same vertex and stuff!

:) your welcome

Aloiza [94]3 years ago

6 0

Answer:

$\frac{1}{4} {x}^{2} - 4x + 7$

Step-by-step explanation:

f(×) = 1/4 (x- 2)^2 + 3

= 1/4 ( x^2 -2x -2x +4) +3

=1/4 x^2 -4x +4 +3

=1/4 x^2 -4x +7

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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

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3 years ago

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Viktor [21]

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