1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sergejj [24]
3 years ago
12

B. -2(x + 7) Help me

Mathematics
1 answer:
Serhud [2]3 years ago
5 0

- 2(x + 7)

mutiply the bracket by -2

(-2)(x)= -2x

(-2)(7)= -14

Answer:

-2x-14

You might be interested in
A 9 3/5 inch long pipe is cut into eight equal length pieces. How long is each piece?
Alenkinab [10]

Answer:

1.2

Step-by-step explanation:

9 3/5 divided by 8


3 0
4 years ago
Help with number 9 please please thank you
Harlamova29_29 [7]

Answer:

\large\boxed{53.9ml=0.0539l}

Step-by-step explanation:

1l=1,000ml\to1ml=\dfrac{1}{1,000}l=0.001l\\\\\text{Therefore}\\\\53.9ml=53.9\cdot0.001l=0.0539l

6 0
3 years ago
Consider the probability that greater than 96 out of 153 DVDs will work correctly. Assume the probability that a given DVD will
ICE Princess25 [194]

Answer:

0.3594 = 35.94% probability that greater than 96 out of 153 DVDs will work correctly.

Step-by-step explanation:

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

Normal probability distribution

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

When we are approximating a binomial distribution to a normal one, we have that \mu = E(X), \sigma = \sqrt{V(X)}.

In this problem, we have that:

n = 153, p = 0.62

So

\mu = E(X) = np = 153*0.62 = 94.86

\sigma = \sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{153*0.62*0.38} = 6

Probability that greater than 96 out of 153 DVDs will work correctly.

97 or more DVDs, which is 1 subtracted by the pvalue of Z when X = 97. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{97 - 94.86}{6}

Z = 0.36

Z = 0.36 has a pvalue of 0.6406

1 - 0.6406 = 0.3594

0.3594 = 35.94% probability that greater than 96 out of 153 DVDs will work correctly.

3 0
3 years ago
40(500-480x4050)-4084
creativ13 [48]

Answer:

Hope this helps! <3

7 0
3 years ago
Sarah has gone to work for 60 days on 39 of those days she arrived at work before 8:30 a.m. On the rest of those days she arrive
Ann [662]
60 - 39 = 21
21 / 60 = 7 / 20

7/20

5 0
3 years ago
Other questions:
  • Which is the correct way to write 602, 200,000,000,000,000,000,000 in scientific notation?
    12·1 answer
  • In a large backyard, there are 4 times as many shrubs as trees. Altogether, there are 40 trees and shrubs. How many trees are in
    13·2 answers
  • How many way can 4 people line up out of 20?
    14·2 answers
  • Geometry help.. Image included, Thanks!
    7·1 answer
  • What is the slope of the line 4x+7y=9
    15·2 answers
  • What is the y-intercept of the graph?
    9·2 answers
  • Jorge makes 59.50 an hour for working at a Shoe Store. He wants to buy a skateboard that costs $110,00. How many hours must Jorg
    15·1 answer
  • Please help
    14·1 answer
  • Table of values for y=2x^2-2x
    7·1 answer
  • What is 16+6 <br><br> A. 2(8+1)<br> B. 2(8+3)<br> C. 3(2+3)<br> D. 8(2+3)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!