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lapo4ka [179]
2 years ago
15

What is perform the indicate operation​

Mathematics
1 answer:
aksik [14]2 years ago
4 0

Answer:

Many techniques will simplify your work as you perform operations with algebraic fractions. As you review the examples, note the steps involved in each operation and any methods that will save you time.

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Triangle DEF has vertex coordinates D(0, -3), E(-1,0), and F(-2,-1). It is
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D (0, -3)
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F (2, -1)
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5<br> 2. Simplify<br> .<br> 5<br> O 57<br> O 5-1<br> o<br> 5<br> O<br> 57
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Answer:

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Step-by-step explanation:

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3 years ago
Find the indicated probability. The weekly salaries of teachers in one state are normally distributed with a mean of $490 and a
Alecsey [184]

Given Information:

Mean weekly salary = μ = $490

Standard deviation of weekly salary = σ = $45

Required Information:

P(X > $525) = ?

Answer:

P(X > $525) = 21.77%

Step-by-step explanation:

We want to find out the probability that a randomly selected teacher earns more than $525 a week.

P(X > 525) = 1 - P(X < 525)\\\\P(X > 525) = 1 - P(Z < \frac{x - \mu}{\sigma} )\\\\P(X > 525) = 1 - P(Z < \frac{525 - 490}{45} )\\\\P(X > 525) = 1 - P(Z < \frac{35}{45} )\\\\P(X > 525) = 1 - P(Z < 0.78)\\\\

The z-score corresponding to 0.78 from the z-table is 0.7823

P(X > 525) = 1 - 0.7823\\\\P(X > 525) = 0.2177\\\\P(X > 525) = 21.77 \%

Therefore, there is 21.77% probability that a randomly selected teacher earns more than $525 a week.

How to use z-table?

Step 1:

In the z-table, find the two-digit number on the left side corresponding to your z-score. (e.g 0.7, 2.2, 1.5 etc.)

Step 2:

Then look up at the top of z-table to find the remaining decimal point in the range of 0.00 to 0.09. (e.g. if you are looking for 0.78 then go for 0.08 column)

Step 3:

Finally, find the corresponding probability from the z-table at the intersection of step 1 and step 2.

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3 years ago
Please help me with this
Irina18 [472]

The sum of 8m and 3 is 8m + 3

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8 0
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To become a member at a local nature preserve, applicants must pay an initiation fee of $100 plus their yearly membership dues ,
Natalija [7]

The points are (2,150), (4,200).

The slope of the line joining the points is,

\begin{gathered} m=\frac{200-150}{4-2} \\ =25 \end{gathered}

Thus, the slope represents the increse in cost per year of membership.

5 0
11 months ago
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