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2 years ago

Can anyone solve this 8th grade work 1/2 x +10 = 3/4(x+10)

Mathematics

1 answer:

BlackZzzverrR [31]2 years ago

5 0

Answer:

X= 5

Step-by-step explanation:

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Helppppppppppppppppppppp

Nastasia [14]

Answer:

Step-by-step explanation:

1) 5 - [-5] = 5 + 5 = 10

2)8 - 13 = 8 + (-13) = -5

3) 12 +(-3) = 9

4) x + (-7) = 5

x - 7 = 5

x = 5 + 7

x = 12

We need to add 12 to (-7) to get 5

5) 7 - x = -5

7 = -5 +x

7 + 5 = x

12 = x

We need to take away 12 to 7 to get (-5)

6) 7 - (-10) = 7 + 10 = 17

17° C

8 0

3 years ago

Relationships between means, standard deviations, X values,and z-scores

Vlada [557]

Answer:

a) The average salary of firefighters in Portugal is $583.

b) The standard deviation of the salary of firefighters in Portugal is $319.8

Step-by-step explanation:

We are given the following in the question:

a) Standard Deviation, σ = $145.80

We are given that the distribution of salary of professor is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

A salary of $510.10 has a z-score of -0.50.

Putting values, we get,

$-0.50 = \displaystyle\frac{510.10-\mu}{145.80}\\\\\mu = 0.50(145.80) + 510.10\\\Rightarrow \mu = 583$

Thus, the average salary of firefighters in Portugal is $583.

b) Mean, μ = $2,132

We are given that the distribution of salary of computer programmers is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

The salary of $2,291.90 has a z-score of +0.50

Putting values, we get,

$0.50 = \displaystyle\frac{2291.90-2132}{\sigma}\\\\\sigma= \frac{2291.90-2132}{0.50}\\\\\sigma = 319.8$

Thus, the standard deviation of the salary of firefighters in Portugal is $319.8

6 0

4 years ago

Having some trouble here need some help not really good at this

kolezko [41]

Answer:

none of these are correct

Step-by-step explanation:

4 0

2 years ago

What is the coefficient of the first term in this expression? 6n³ + 4 + m<br><br>pls help<br>

damaskus [11]

Answer:

The coefficient here is 6 because it is right beside the variable

Step-by-step explanation:

3 0

3 years ago

What is the answear for 5xy+4y-z+3xy

Irina18 [472]

Answer:

8xy+4y-z

Step-by-step explanation:

Add values with the same variables; in this case xy

6 0

4 years ago

Can anyone solve this *8th grade work* 1/2 x +10 = 3/4(x+10)

Can anyone solve this 8th grade work 1/2 x +10 = 3/4(x+10)