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2 years ago

Hello can someone help me with this factoring problem? thank you!

Mathematics

1 answer:

Alex2 years ago

8 0

I think this is correct

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A random sample of eighty-five students in Chicago city high schools takes a course designed to improve SAT scores. Based on the

erica [24]

Answer:

(B) The correct interpretation of this interval is that 90% of the students in the population should have their scores improve by between 72.3 and 91.4 points.

Step-by-step explanation:

Confidence interval is the range the true values fall in under a given <em>confidence level</em>.

Confidence level states the probability that a random chosen sample performs the surveyed characteristic in the range of confidence interval. Thus,

90% confidence interval means that there is 90% probability that the statistic (in this case SAT score improvement) of a member of the population falls in the confidence interval.

7 0

3 years ago

1 + 5sin^2x= 7sin^2x solve trig equation. Can you show me how to solve this trig equation?

pantera1 [17]

Answer: $x = \frac{\pi}{4}\pm k\frac{\pi}{2}\,\,\,\,\,\,k=\{0,1,2,...\}$

Step by step:

$1 + 5\sin^2x= 7\sin^2x\\\sin^2 x\rightarrow z\\1 + 5z = 7z\\2z = 1\\z = \frac{1}{2}\implies \sin^2 x = \frac{1}{2}\\|\sin x| = \frac{1}{\sqrt{2}}\\\sin x = \pm\frac{1}{\sqrt{2}}=\pm\frac{\sqrt{2}}{2}\\\implies x = \frac{\pi}{4}\pm k\frac{\pi}{2}\,\,\,\,\,\,k=\{0,1,2,...\}$

(Used a table of common angles)

8 0

3 years ago

Translate the given phrase into an algebraic expression and simplify if possible: the difference of −5 and −30.

lawyer [7]

Answer:

IIaI-IbII

Step-by-step explanation:

II-30I-I-5II=

I30-5I=

I25I=

II-5I-I-30II=

I5-30I=

I-25I=

8 0

2 years ago

3/5(4.3 – 7.8) + 2 1/9 ?

True [87]

Answer:

0.01

Step-by-step explanation:

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3 years ago

Read 2 more answers

What is the perimeter of the polygon shown below?

yKpoI14uk [10]

Answer:

I don't see the polygon but all you need to do is add up all the sides.

6 0

3 years ago