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OverLord2011 [107]
2 years ago
10

8x2 + (- 14x2) – 16x2

Mathematics
2 answers:
Kitty [74]2 years ago
6 0

Answer:

-44

Step-by-step explanation:

Stolb23 [73]2 years ago
6 0

Answer:

-44

Step-by-step explanation:

16 + -28 - 32 = -44

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What 89,659 rounded to the nearest hundred thousand
lisov135 [29]
100,000

Since 8 rounds up to 10, it will go up to 100,000.
5 0
2 years ago
In a recent year the fuel economy of all passenger vehicles was 19.8 mpg. A trade organization sampled 50 passenger vehicles for
salantis [7]

Answers and Step-by-step explanation:

Hypotheses are:

H o=19.8

H 1 ≠19.8

Here we have following information:

s=2.45, X bar=20.1, n=50

So test statistics will be

t=20.1-19.8/(2.45/\sqrt{50} =0.87

Degree of freedom : d f = n - 1 = 50 - 1 =49

Test is two tailed so critical value of the test is -1.30 and 1.30.

Rejection region:

if t < -1.30 and t > 1.30, reject H o

Since test statistics lie in the rejection region so we fail to reject the null hypothesis.

(b)

The observed significance of the test is

P value =0.3885

(c)

Since p value is greater than 0.20 so we fail to reject the null hypothesis.

5 0
3 years ago
The Copy Shop has made 20 copies of a document for you. Since the defective rate is 0.1, you think there may be some defective c
Pepsi [2]

Answer:

Binomial

There is a 34.87% probability that you will encounter neither of the defective copies among the 10 you examine.

Step-by-step explanation:

For each copy of the document, there are only two possible outcomes. Either it is defective, or it is not. This means that we can solve this problem using the binomial probability distribution.

Binomial probability distribution:

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinatios of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

In this problem

Of the 20 copies, 2 are defective, so p = \frac{2}{20} = 0.1.

What is the probability that you will encounter neither of the defective copies among the 10 you examine?

This is P(X = 0) when n = 10.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{10,0}.(0.1)^{0}.(0.9)^{10} = 0.3487

There is a 34.87% probability that you will encounter neither of the defective copies among the 10 you examine.

8 0
3 years ago
In ΔHIJ, the measure of ∠J=90°, JH = 81 feet, and HI = 91 feet. Find the measure of ∠I to the nearest degree.
kakasveta [241]

Answer:

63°

Step-by-step explanation:

  • Sin0=\frac{81}{91}
  • x=sin^{-1}(81/91)\\\\
  • = 62.887
  • ≈ 63°

༻﹡﹡﹡﹡﹡﹡﹡༺

hope it helps...

have a great day!!

8 0
3 years ago
How do I solve 48x-36x=-144
sasho [114]
48x-36x=-144\\\\12x=-144\ \ \ \ \ \ \ \ |divide\ both\ sides\ by\ 12\\\\\boxed{x=-12}
5 0
3 years ago
Read 2 more answers
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