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quester [9]
3 years ago
11

Find the value of x. 5x+18+2x=5

Mathematics
2 answers:
Lesechka [4]3 years ago
3 0

Answer: x=-1.9

Step-by-step explanation:

5x+2x=7x

7x+18=5

-18 on both sides

7x=-13

divide 7 on both sides

x=-1.9

brilliants [131]3 years ago
3 0

Answer

<h2><em>X=</em><em>-</em><em>1</em><em>.</em><em>9</em></h2>

<em>solution</em>

<em>5x + 18 + 2x = 5 \\ or \: 5x + 2x + 18 = 5 \\ or \: 7x + 18 = 5 \\ or7x = 5 - 18 \\ or \: 7x =  - 13 \\ \: x =  -  \frac{13}{7}</em>

<em>X=</em><em>-</em><em>1</em><em>.</em><em>9</em>

<em>hope </em><em>this </em><em>helps.</em><em>.</em>

<em>Good </em><em>luck</em><em> on</em><em> your</em><em> assignment</em><em>.</em><em>.</em><em>.</em>

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wariber [46]

Answer:

There is not enough evidence to support the claim that the doors are either too long or too short.

Step-by-step explanation:

We are given the following in the question:  

Population mean, μ = 2058.0 millimeters

Sample mean, \bar{x} = 2047.0 millimeters

Sample size, n = 17

Alpha, α = 0.10

Sample standard deviation, s = 27

First, we design the null and the alternate hypothesis

H_{0}: \mu = 2058.0\text{ millimeter}\\H_A: \mu \neq 2058.0\text{ millimeter}

We use Two-tailed t test to perform this hypothesis.

Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }

Putting all the values, we have

t_{stat} = \displaystyle\frac{ 2047.0 - 2058.0}{\frac{27}{\sqrt{17}} } = -1.6798

Now, t_{critical} \text{ at 0.10 level of significance, 16 degree of freedom } = \pm 1.7396

Since, the calculated t statistic lies in the acceptance region, we fail to reject the null hypothesis and accept the null hypothesis.

Thus, there is not enough evidence to support the claim that the doors are either too long or too short.

5 0
4 years ago
If i stands for income and e stands for expenses, what is the formula for p, profits?
Zarrin [17]
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3 years ago
Q5: The probability that event A occurs is 5/7 and the probability that event B occurs is 2/3 . If A and B are independent event
bekas [8.4K]

Answer:

P(A \cap B)

And we can use the following formula:

P(A \cap B)= P(A)* P(B)

And replacing the info we got:

P(A \cap B) = \frac{5}{7} \frac{2}{3}= \frac{10}{21}=0.476

Step-by-step explanation:

We define two events for this case A and B. And we know the probability for each individual event given by the problem:

p(A) = \frac{5}{7}

p(B) = \frac{2}{3}

And we want to find the probability that A and B both occurs if A and B are independent events, who menas the following conditions:

P(A|B) = P(A)

P(B|A) = P(B)

And for this special case we want to find this probability:

P(A \cap B)

And we can use the following formula:

P(A \cap B)= P(A)* P(B)

And replacing the info we got:

P(A \cap B) = \frac{5}{7} \frac{2}{3}= \frac{10}{21}=0.476

7 0
3 years ago
Calculate the area of area of a rectangular with a base of 10cm and a height of 6cm​
nadya68 [22]

Answer:

<em>60cm²</em>

Step-by-step explanation:

Length = 6cm

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Here’s the answer to your problem:

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