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Umnica [9.8K]
3 years ago
15

The length of a rectangle is 2 inches less than three times its width, and its perimeter is 36 inches. Find the width of the rec

tangle.
Mathematics
1 answer:
Kazeer [188]3 years ago
5 0
36/4=9
9/2= 4.5 length
36-9=27
27/2= 13.5 width

Answer:
The width is 13.5 inches
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Can someone solve this for me plsss i really need help with this no links an dno doing it just for the points need all three que
guajiro [1.7K]
The first one is A and then the next one I believe should be 210 for both
6 0
2 years ago
Mr. Hammond is the volunteer coordinator for a company that puts on running races. Last year, the company organized 7 short race
worty [1.4K]

Answer:

28 short race volunteers

76 long race volunteers

Step-by-step explanation:

Let :

Short races = a

Long races = b

LAST YEAR:

7a + 8b = 804 - - - - (1)

THIS YEAR:

11a + 5b = 688 - - - (2)

Multiply (1) by 5 and (2) by 8

35a + 40b = 4020

88a + 40b = 5504

Subtract

-53a = - 1484

a = 1484 / 53

a = 28

Put a = 28 in equation (1)

7(28) + 8b = 804

196 + 8b = 804

8b = 804 - 196

8b = 608

b = 76

28 short race volunteers

76 long race volunteers

4 0
2 years ago
A multiple choice test is composed of 10 questions. Each question has four possible answers, only one of the four possible answe
kompoz [17]

Answer:

Let X the random variable of interest "Number of correct anwers on the tet", on this case we now that:

X \sim Binom(n=10, p=0.25)

And the expected value is given by:

E(X) = np =10*0.25 = 2.5

Step-by-step explanation:

Previous concepts

A Bernoulli trial is "a random experiment with exactly two possible outcomes, "success" and "failure", in which the probability of success is the same every time the experiment is conducted". And this experiment is a particular case of the binomial experiment.

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

The probability mass function for the Binomial distribution is given as:  

P(X)=(nCx)(p)^x (1-p)^{n-x}  

Where (nCx) means combinatory and it's given by this formula:  

nCx=\frac{n!}{(n-x)! x!}  

Solution to the problem

Let X the random variable of interest "Number of correct anwers on the tet", on this case we now that:

X \sim Binom(n=10, p=0.25)

And the expected value is given by:

E(X) = np =10*0.25 = 2.5

4 0
3 years ago
Need help!! You can buy 10 yogurts for $6.50. How much would it cost for nine yogurts!?
ahrayia [7]

To solve this problem, you should find the rate --->  cost per yogurt (cost/yogurt)

$6.50/10 yogurts = $0.65/yogurt

It costs $0.65 per yogurt, so you can multiply 9 by $0.65 to find the total cost of 9 yogurt.

9(0.65) = $5.85

6 0
3 years ago
Which number is greater than (>) 6.841?
icang [17]
6.842 or higher. When you line up the decimals, you see 6.842 has a 2 and 6.841 has a 1. 2 is greater than 1, more greater numbers are 6.843, 6.844, 6.845, etc.
6 0
3 years ago
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