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trapecia [35]
3 years ago
6

How can you check the solution of an equation?

Mathematics
2 answers:
vichka [17]3 years ago
4 0
In order to check you would plug in the value of x and see if it equals the same thing.
or do the opposite of the equation. it depends on if you are dealing with x or not. so if you have 6-3 is 3 you can do 3+3 is 6
vagabundo [1.1K]3 years ago
4 0
Look at the left hand side of equation and if given number matches
 do the same for the right hand
see if numbers match
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What is the answer for this problem?
Jobisdone [24]

Answer:

x=2

Step-by-step explanation:

AB/BD=BC/BE

2/1=x/1

2=1x

x=2

3 0
3 years ago
Find the area of the carpet tile. Then find the area covered by 120 carpet tiles.
weqwewe [10]

The area of the carpet is the amount of space it occupies

  • The area of the carpet tile is 256 square inches
  • The area covered by 120 tiles is 30720 squares inches

<h3>How to determine the carpet area</h3>

The dimension of the carpet tile is 16 inches by 16 inches

So, the area is:

Area = 16 * 16

Evaluate the product

Area = 256

Hence, the area of the carpet tile is 256 square inches

For 120 carpet tiles, the area is:

Area = 120 * 256

Area = 30720

Hence, the area covered by 120 tiles is 30720 squares inches

Read more about areas at:

brainly.com/question/24487155

7 0
2 years ago
Can someone help plz
olchik [2.2K]

Answer:

A.) 2x - 9x - 30 = -6

Step-by-step explanation:

hello !

to solve this system of equations, first, we substitute the equation y = 3x + 10 to the <em>y </em>variable in the equation 2x-3y = -6. Therefore, we get:

2x - 3(3x+10)=-6

now, we simplify by multiplying -3 to the variables inside the parenthesis, which, in short, is also called the distributive property. thus, we get:

2x - 9x - 30 = -6

4 0
3 years ago
The sum of three numbers is 123. The second number is 8 more than the first. The third number is 3 times the first. What are the
Aleksandr [31]

Answer:

41 is my geuss

Step-by-step explanation:

5 0
2 years ago
A ski lift is designed with a total load limit of 20,000 pounds. It claims a capacity of 100 persons. An expert in ski lifts thi
Yanka [14]

Answer:

0.5 = 50% probability that a random sample of 100 independent persons will cause an overload

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions 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.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For the sum of n values of a distribution, the mean is \mu \times n and the standard deviation is \sigma\sqrt{n}

An expert in ski lifts thinks that the weights of individuals using the lift have expected weight of 200 pounds and standard deviation of 30 pounds. 100 individuals.

This means that \mu = 200*100 = 20000, \sigma = 30\sqrt{100} = 300

If the expert is right, what is the probability that a random sample of 100 independent persons will cause an overload

Total load of more than 20,000 pounds, which is 1 subtracted by the pvalue of Z when X = 20000. So

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

Z = \frac{20000 - 20000}{300}

Z = 0

Z = 0 has a pvalue of 0.5

1 - 0.5 = 0.5

0.5 = 50% probability that a random sample of 100 independent persons will cause an overload

5 0
3 years ago
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