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2 years ago

FREE GIVE AWAY IN 5 MINUTES

Mathematics

2 answers:

Olegator [25]2 years ago

8 0

Answer:

Thanks.......... follow me

IRINA_888 [86]2 years ago

8 0

Answer:

please go help me with my 4 most recent questions please!!

Step-by-step explanation:

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Help asap please.. Brainliest to correct!

vovikov84 [41]

Answer:

Step-by-step explanation:

x + 6 I x³ + 2x² - 10x + 84 I x² - 4x + 14

x³ + 6x²

- -

-4x² - 10x

-4x² - 24x

+ +

14x + 84

- -

P(x) =(x +6)* ( x² - 4x + 14) + 0

5 0

2 years ago

Three potential employees took an aptitude test. Each person took a different version of the test. The scores are reported below

emmasim [6.3K]

Answer:

Tera had the higher z-score, so she should be offered the job.

Step-by-step explanation:

Z- score:

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.

In this problem:

Whoever has the higher z-score should get the job.

Brittany:

Scored 88.3, mean 63.1, standard deviation 14. So

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

$Z = \frac{88.3 - 63.1}{14}$

$Z = 1.8$

Alissa:

Scored 236.5, mean 219, standard deviation 25. So

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

$Z = \frac{236.5 - 219}{25}$

$Z = 0.7$

Tera:

Scored 7.75, mean 6.66, standard deviation 0.5. So

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

$Z = \frac{7.75 - 6.66}{0.5}$

$Z = 2.18$

Tera had the higher z-score, so she should be offered the job.

3 0

3 years ago

How do you complete the square of x^2-14x+33=0?

iVinArrow [24]

X² - 14x + 33 = 0 is in the form ax² + bx + c = 0. We will need this for the second step.

Subtract 33 from both sides
x² - 14x = - 33

Divide the b term by 2 and then square the result. Then add that to both sides.
- 14 / 2 is - 7. (- 7)² = 49. Add that to both sides

x² - 14x + 49 = - 33 + 49

Combine the constants and factor the trinomial
(x - 7)² = 16

Square root both sides
x - 7 = +/- 4
or
x - 7 = - 4 and x - 7 = 4

You have to place a plus-minus statement because (- 4)² and 4² both equal 16.

Now we solve for x in each equation. Add 7 to both sides to isolate our variable.
x = 3 and x = 11

7 0

3 years ago

Kevin and Randy Muise have a jar containing 78 coins, all of which are either quarters or nickels. The total value of the coins

gregori [183]

Answer:

50 quarters and 28 nickels

Step-by-step solution:

We have two variables we are solving for. We will call them Q for the number of quarters and N for the number of nickels.

We know that the total number of coins is equal to 78, and we know that the total amount the coins are worth is equal to $13.90. With this information, we can set up a system of equations:

Q + N = 78

0.25Q + 0.05N = 13.90

Now we can solve for either Q or N in the first equation and solve by substitution by plugging the value into the second equation. Let's solve for Q:

Q = 78 - N

Now plug in 78-N for Q:

0.25(78-N) + 0.05N = 13.90

Distribute and combine like terms:

19.50 - 0.25N + 0.05N = 13.90

19.50 - 0.20N = 13.90

-0.20N = -5.60

N = 28

Now we know that there are 28 nickels. We can plug this into one of the original equations to solve for Q:

Q + 28 = 78

Q = 50

There are 50 quarters. We can verify our answer by plugging the values for A and N into the other equation (optional step to check work):

0.25(50) + 0.05(28) = 13.90

12.5 + 1.40 = 13.9

13.9 = 13.9

Our answer is correct.

5 0

3 years ago

Help please it’s due in 23 mins

777dan777 [17]

Answer:

Question is is the A Question 2 is C Question 3 is B and Question 4 is D

Step-by-step explanation:

I hope this helped you understand ratios a little

6 0

2 years ago