3 years ago

How would you find the values of x and y?

Mathematics

1 answer:

Ipatiy [6.2K]3 years ago

6 0

If you havent learnt Sin, Cos yet, let me know, so we can try the other solutions.

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A trucking firm has a large inventory of spare parts that have been in storage for a long time. It knowsthat some proportion of

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Answer:

$0.1546\leq \widehat{p}\leq 0.3513$

Step-by-step explanation:

The firm tests 75 parts, and finds that 0.25 of them are notusable

n = 75

x = 0.25 \times 75 = 18.75≈19

$\widehat{p}=\frac{x}{n}$

$\widehat{p}=\frac{19}{75}$

$\widehat{p}=0.253$

Confidence level = 95%

So, Z_\alpha at 95% = 1.96

Formula of confidence interval of one sample proportion:

$=\widehat{p}-Z_\alpha \sqrt{\frac{\widehat{p}(1-\widehat{p}}{n}}\leq \widehat{p}\leq \widehat{p}+Z_\alpha \sqrt{\frac{\widehat{p}(1-\widehat{p}}{n}}$

$=0.253-(1.96)\sqrt{\frac{0.253(1-0.253)}{75}}\leq \widehat{p}\leq0.253+(1.96)\sqrt{\frac{0.253(1-0.253}{75}}$

Confidence interval $=0.1546\leq \widehat{p}\leq 0.3513$

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3 years ago

Jamal is 12 years older than twice Stephanie’s age. The sum of their ages is 45. A. If Stephanie’s age is represented by x, writ

amm1812

Answer:

Jamal's age = 2×x+12= 2x+12

sum og ages = 45

2x+12+x= 45

=3x+12=45

=45-12= 3x

= 32=3x

x= 32/3= 10.67

2x+13 =21.34+12= 33.34

hope.ot helps

plz mark as brainliest

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3 years ago

2) A circle has an area of 121 ñ cm. Find its circumference. (Round your answer to the

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Answer:

If the area is 121 cm the answer is 38.99 if its 12 cm then the answer is 12.28

Step-by-step explanation:

Im not sure if correct but i tried

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2 years ago

What is the radian measure of an angle equal to 225 ?

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The answer is it’s 5 pie over 4

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3 years ago

An examination consisting of ten true-or-false questions was taken by a class of 100 students. The probability distribution of t

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Answer:

The height of this rectangle is 8/10

Step-by-step explanation:

Please see attachment .

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3 years ago