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baherus [9]
4 years ago
15

7. Ned took a test with 25 questions. He lost 4

Mathematics
1 answer:
Alenkinab [10]4 years ago
5 0
84 points lost overall
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2. A bag contains 5 red marbles, 3 blue marbles, 6 white marbles, and 2 green marbles.
Georgia [21]

Answer:

Step-by-step explanation:

5 red

3 blue

6 white

2 green

total 16 marbles.

Note: P(E) = probability of event E happening

P(~E) = probability of event E NOT happening.

We usually leave probabilities in fractions whenever possible because they will not be subject to round-off errors.

A. choose one marble at random.

P(W) = 6 white / 16 total = 3/8

B. choose one marble at random.

P(~R) = (16-5)/16 = 11/16

C. choose one marble at random, then a second one without replacement,

there will be 3 blue out of 16 at the beginning, then if successful, there will be 2 blue out of 15.

P(BB) = (3/16)*(2/15) = 1 / 40

D. choose two with replacement

5 red out of 16 for first draw, still 5 red out of 16 for second draw.

P(RR) = (5/16)^2 = 25/256

5 0
3 years ago
Please help :(, I don’t know
TEA [102]

Answer:

Suit:  $13; Shoes:  $8

Step-by-step explanation:

Represent the unknowns (which are commissions on the sale of suits and shoes) by u and h.

The associate earned a commission of $47 the first week.  That $47 represents the sum of the commission earned from selling suits and the commission earned from selling shoes.

We can represent this fact as follows:

3u + 1h = $47              (3 times the commission for selling 1 suit)

The appropriate equation describing the situation in the second week follows:

7u  + 2h = $107

Now we have two linear equations in two unknowns, enough to enable us to calculate the commissions on selling suits and shoes.

3u + 1h = $47

7u  + 2h = $107

We are to solve this system using the substitution method.  The easiest approach here is to solve the first equation for h:  h = $47 - 3u

and

then replace h in the second equation by $47 - 3u:

7u + 2($47 - 3u) = $107

Performing the indicated multiplication, we get 7u + $94 - 6u = $107

Simplifying this results in u + $94 = $107, and subtracting $94 from both sides reduces this equation to u = $13.

Thus, the commission on selling a suit is $13.

The commission on selling a pair of shoes is obtained from subbing $13 for u in the very first equation (3u + 1h = $47):  3($13) + h = $47.  Subtracting $39 from both sides results in $8 = h.  The commission on selling a pair of shoes is $8.

3 0
3 years ago
If data set A has a smaller standard deviation than data set B, what would be different about their distributions?
Aleksandr-060686 [28]

Answer:

Data set B would have flatter distribution with more data in each tail.

Step-by-step explanation:

We are given the following in the question:

Data set A has a smaller standard deviation than data set B.

\sigma_A < \sigma_B

Standard Deviation:

  • It is a measure of dispersion of data.
  • It tells us about how much the data deviates around the mean.
  • It tells us about the overall deviation of the data from the mean.
  • The standard deviation is small when the data are all close to the mean showing less variation.
  • The standard deviation is larger when the data values are farther away from the mean, showing more variation.

Since data A has less standard deviation than data B, then data B has a flatter graphical representation as more of the data are present on the tails.

8 0
4 years ago
PLS HELP ASAP I WILL GIVE BRAINERLIST PLUS 15 POINTS
horrorfan [7]

The coldest temperature is the negative value furthest away from 0.

-10 would be the answer.

7 0
4 years ago
Read 2 more answers
What is the width of a rectangular prism with a length of 13 feet, volume of 11232 cubic feet, and height of 36 feet?
Fynjy0 [20]

Answer:

24 ft.

Step-by-step explanation:

Volume (V) equals the product of length (l), width (w), and height (h)

V = l × w × h

Plug in the measurement you have into the equation

      11232 = 13 × w × 36

Multiply 13 and 36

      11232 = 468 × w

Divide both sides by 468

      24 = w

6 0
3 years ago
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