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aniked [119]
3 years ago
9

Help please I don’t understand

Mathematics
1 answer:
son4ous [18]3 years ago
6 0

They believe they are asking how much it is in all...

  1. Count up all the x’s..
  2. Hope that makes since
You might be interested in
PLZ ANSWER: A sandwich store charges a $10 delivery fee and $4.50 for each sandwich which is the total cost language and deliver
Irina-Kira [14]
Answer

$37

Explanation

it costs $4.50 per sandwich so you multiply that by 6 which gets you $27. then you add the delivery fee ($10) to that and you get $37

hope this helps!!
6 0
2 years ago
A bakery uses 25 cups of flour to make 8 loaves of bread. What is true about the number of cups of flour in each loaf?
Levart [38]
So basically we need to divide

25/8=3.125

they need 3.125 cups of flour in each loaf

I hope I've helped!
6 0
3 years ago
at a sale shirts were sold for $15 each this price was 80% of their original price. What was the original price
Oliga [24]
15\x and 80\100
15 times 100=1500
1500=8x
then you divide 1500 by 80 so x is by itself
x=18.75







8 0
3 years ago
Read 2 more answers
Which means the sum of w and 3.4 is greater than or equal to 10.5
mr_godi [17]
It states "greater than or equal", therefore, you will have to use a sign which has equal in it.
w + 3.4 ≥ 10.5
5 0
3 years ago
An instructor believes the distribution of scores on her final exam will have mean 62 and standard deviation 7. Fred is a studen
OLga [1]

Answer:

a) P(47

And then the probability that Fred will not score between 47 and 77 is

1-0.968 = 0.0321

b) P(45

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Part a

Let X the random variable that represent the scores of a population, and for this case we know the distribution for X is given by:

X \sim N(62,7)  

Where \mu=62 and \sigma=7

We are interested on this probability  on the probability that Fred will not score between 47 and 77. So we can begin finding this probability

P(47

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(47

And we can find this probability on this way:

P(-2.143

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-2.143

And then the probability that Fred will not score between 47 and 77 is

1-0.968 = 0.0321

Part b

P(45

And we can find this probability on this way:

P(-2.429

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-2.429

7 0
3 years ago
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