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3 years ago

Helpppp plssss!! Not so sure bout my answer!!Thanks

Mathematics

2 answers:

RUDIKE [14]3 years ago

8 0

Well, for us to check your answer or help you with it, you have to give us your opinion first and explain why. Then, that’s when we will check and correct you if it’s wrong.

Leya [2.2K]3 years ago

7 0

The -4 in the original equation of point form is the slope. To achieve a perpendicular function of the original, the slope has to be a recipricol of the original slope and also the sign must also be the opposite. So the only choice that satisfies this is A. And also to confirm, the answer A equation of point form can be solved by setting both sides pertaining to x and y to 0 to determine a point which the graph will pass through.

y - 7 = 0
y = 7

x + 5 = 0
x = -5

Hence, the point the graph will pass through is (-5, 7) which confirms choice A is correct.

See attached graphed equation for confirmation.

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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

Robert needs to cut four shelves from a board that is 2.5 meters long. The second shelf is 18 centimeters longer than twice the

jeyben [28]

I would say 640.5 centimeters. However, remember that this is high school work, and I am only in middle school. This may not be correct, as I am doubting myself, yet cannot find errors in my work. Please take caution with this answer! Hope this isn't a detriment to you, bye! :)

8 0

3 years ago

Read 2 more answers

Factor 8y^2+17+2. Please

In-s [12.5K]

It is A (8y + 1)(y + 2) because if you multiply it out you get 8y^2 + 16y + 1y + 2 which is equal to 8y^2 + 17y + 2

4 0

3 years ago

Read 2 more answers

Idk how to do this. Please help

Nitella [24]

Answer: i believe that the answer is J