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3 years ago

I REALLY NEED HELP NON THIS

Mathematics

2 answers:

NemiM [27]3 years ago

8 0

FIRST
We need to make a comparison for peanuts and raisins they need.
peanuts : raisins = 1 3/8 : 2/3
peanuts : raisins = 11/8 : 2/3

Simplify the ratio so it's not on a fraction form
peanuts : raisins = 11/8 × 3/2
peanuts : raisins = 33 : 16
For 33 pounds of peanuts, we need 16 pounds of raisins

SECOND
Calculate the need of peanuts using ratio above
the sum of ratio = 33 + 16 = 49

need of peanuts = ratio of peanut/sum of ratio × sum of pounds
need of peanuts = 33/49 × 245
need of peanuts = 8,085/49
need of peanuts = 165

They need 165 pounds of peanuts to make 245 pounds of trail mix

Radda [10]3 years ago

3 0

Its not showing nothing

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I need help 3-6 pleasr

Colt1911 [192]

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412 - 65 + 0.50x
Where, x = Number of Texts sent

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"Per" tells us the magnitude for an Unit value.

5) Associative property = (a+b) + c = a+ (b+c)
Commutative property = a + b = b + a
Distributive Property = a(b+c) = ab+bc

They all have their unique characteristics and can be differentiated on that basis.

6) They all are same.
At the end, without parentheses and in proper symbol, it would be equal to -3/4

Hope this helps!

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3 years ago

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3 years ago

Sketch a model to show how to combine the following fractions: 4/3 + 2/3 =

DerKrebs [107]

4/3 + 2/3= (4+2)/3= 6/3= 2

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3 years ago

Read 2 more answers

What is the equation of a line that has a slope of -6 and passes through the point (2,-5)

atroni [7]

Answer:

Y=-6x+7

Step-by-step explanation:

Use the formula change in Y over change in X which is equal to - 6then calculate

6 0

3 years ago

Estimate the minimum and maximum ages for typical textbooks currently used in college courses, then use the range rule of thumb

Maksim231197 [3]

Answer:

$n=(\frac{1.64(4)}{0.25})^2 =688.537 \approx 689$

So the answer for this case would be n=689 rounded up to the nearest integer

Step-by-step explanation:

Assuming this complete question: "Suppose that the minimum and maximum ages for typical textbooks currently used in college courses are 0 and 8 years. Use the range rule of thumb to estimate the standard deviation.

Estimate the minimum and maximum ages for typical textbooks currently used in college courses, then use the range rule of thumb to estimate the standard deviation. Next, find the size of the sample required to estimate the mean age (in years) of textbooks currently used in college courses. Use a 90% confidence level and assume that the sample mean will be in error by no more than 0.25 year."

Solution for the problem

First we need ti find the estimation for the standard deviation using the Rule of thumb, with the following formula:

$s \approx \frac{R}{4}$

Where R is the range defined as :

$R = Max - Min = 8-0 = 8$

So then the deviation would be approximately:

$s \approx 4$

Important concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error (ME) is the range of values below and above the sample statistic in a confidence interval.

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 margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

And on this case we have that $ME =\pm 0.25$ and we are interested in order to find the value of n, if we solve n from equation (1) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (2)

We can assume that the estimator for the population deviation from the rule of thumb is $\hat \sigma = s= 4$

The critical value for 90% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.05;0;1)", and we got $z_{\alpha/2}=1.64$ , replacing into formula (2) we got:

$n=(\frac{1.64(4)}{0.25})^2 =688.537 \approx 689$

So the answer for this case would be n=689 rounded up to the nearest integer

6 0

3 years ago