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Aleonysh [2.5K]
3 years ago
11

justin,carl,Ryan,and will each have seventy-two alien trading cards How many cards do they have in all?

Mathematics
1 answer:
enot [183]3 years ago
3 0
Alright, you can do this problem two different ways.

First Way
~~~~~~~
All three have 27 cards, right?
So, you would find how many people are there as well. There are 3.
So, you would do 27 x 3 = 81
~~~~~~~

Way Two
~~~~~~~
You have 3 people, and they each have 27 cards.
So, you would add them up together 27+27+27=81
~~~~~~~

Hope It helped!! xx
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a rectangle has a length if x + 7 centimeters. The perimeter of the rectangle is 23 centimeter. What is the value of x
Tems11 [23]

23 = 14 + 2x
reasoning \: for \: each \: term \: in \: the  \\ \: above \: equation\\  \\ p = 23 \\  14 = 7 \times 2 \\ 2x = 2 \times x
\:  \:  \:  \:  \: 23 - 14 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 14 + 2x - 14 \\  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  9 = 2x
\:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 9  \div 2 \:  \:  \:  \:  \:  \:  \:  \:  \: 2x \div 2 \\  \\   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 4.5 = x
So, the answer is 4.5
8 0
3 years ago
What is the value of x
PSYCHO15rus [73]

Answer:

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Please its due in tommorow no lie!
Nezavi [6.7K]
First question is 1.40 because i read the question wrong
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7 0
3 years ago
Suppose that one-way commute times in a particular city are normally distributed with a mean of 15.43 minutes and a standard dev
vovikov84 [41]

Answer:

Yes, a commute time between 10 and 11.8 minutes would be unusual.

Step-by-step explanation:

A probability is said to be unusual if it is lower than 5% of higher than 95%.

We use the normal probability distribution to solve this question.

Problems of normally distributed samples are 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.

In this problem, we have that:

\mu = 15.43, \sigma = 2.142

Would it be unusual for a commute time to be between 10 and 11.8 minutes?

The first step to solve this problem is finding the probability that the commute time is between 10 and 11.8 minutes. This is the pvalue of Z when X = 11.8 subtracted by the pvalue of Z when X = 10. So

X = 11.8

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

Z = \frac{11.8 - 15.43}{2.142}

Z = -1.69

Z = -1.69 has a pvalue of 0.0455

X = 10

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

Z = \frac{10 - 15.43}{2.142}

Z = -2.54

Z = -2.54 has a pvalue of 0.0055

So there is a 0.0455 - 0.0055 = 0.04 = 4% probability that the commute time is between 10 and 11.8 minutes.

This probability is lower than 4%, which means that yes, it would be unusual for a commute time to be between 10 and 11.8 minutes.

7 0
2 years ago
Write and solve an inequality to find the values of x for which the perimeter of the rectangle is less than 140.
Mashcka [7]

Given:

Length of the rectangle = x+4

Width of the rectangle = x

The perimeter of the rectangle is less than 140.

To find:

The inequality for the given situation and solve it.

Solution:

We have,

l=x+4

w=x

We know that, the perimeter of a rectangle is

P=2(l+w)

P=2(x+4+x)

P=2(2x+4)

P=4x+8

It is given that the perimeter of the rectangle is less than 140.

P

4x+8

4x

4x

Divide both sides by 4.

x

x

Therefore, the correct option is A because the sign of inequality is < and the solution of inequality is x.

3 0
2 years ago
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