Can someone please help me?!

A middle school science teacher wants to conduct some experiments. There are 15 students in the class. The teacher selects the students randomly to work together in
groups of five.

a.
In how many ways can the teacher combine five of the students for the first
group if order is not important? (3 points)

b.
After the first group of five is selected, in how many ways can the teacher
combine five of the remaining students if order is not important? (3 points)

Answer:

-4

Step-by-step explanation:

it would be -9+5 which is basically 5-9=-4

so, the answer is -4.

Answer:

-4°C

Key:

( | | ) = these in between numbers is the absolute value. EXAMPLE: |-8| = 8

Step-by-step explanation:

If it was -9°C and it INCREASED by 5°C, you need to ADD.

-9°C + 5°C

*Because -9°C is a NEGATIVE NUMBER and is on the LEFT side of the number line, unlike 5°C, you need to count 5 units to the RIGHT of -9°C (Basically subtract the absolute values of each number (-9 = |9|) (5 = |5|) and  make it either positive or negative, depending on which absolute value is the greatest (|9|).*

-9°C + 5°C OR |9| - |5|

|9°C| - |5°C| = |4°C| = -4°C

(because the greatest absolute value, |9|, is negative, the answer is too.)

Answer:

Hi there! The correct option is the third one, aka $176050.

Step-by-step explanation:

median is the value in middle

low from high:

168800

172200

174500

177600

183700

191400

174500 and 177600 is the middle.

174500 + 177600 = 352100

352100/2 = 176050

Answer:(-1,2)

Step-by-step explanation:

Answer:

75

Step-by-step explanation:

Answer:

85 seconds

Step-by-step explanation:

1min=60 seconds

60+25 seconds =85 seconds

Step-by-step explanation:

30+s=180

s=180-30

s=150

Answer:

A rectangle

Step-by-step explanation:

If you look a rectangular pyramid you would see if you use a cross section the figure would be a rectangle

Can I get brainliest please

Answer:

A = 8, B = 6, C = 4 , D = 7

Top = 29

Side = 20

Step-by-step explanation:

Last row : A + A + A + A = 32 ==> A = 8

First row : D + A + D + D = 3D + 8 = 29

                                          3D = 21 ==> D = 7

Second row : B + D + A + B = 27 ==> 2B + 7 + 8 = 27

                                                          2B = 12 ==> B = 6

Third column : D + A + C + A = 27

                      7 + 8 + C + 8  = 27 ==> C = 4

Answer/Step-by-step explanation:

it's 97.

Answer:

43.96

Step-by-step explanation:

You do 2*3.14*7

Answer: The volume is 20 cubic feet

The Width is 1/3 feet

Hope I helped

Step-by-step explanation:

Answer:

128

Step-by-step explanation:

90-27 = 63 + 65 = 128 and since we know x is equal to the opposite side we can assume that x=128

Answer:

16

Step-by-step explanation:

Answer:

2.5 + 3(5-2.1p) = -13.37

2.5+15-6.3p=-13.37

17.5-6.3p=-13.37

-6.3p=-30.87

p=4.9

hope this helps

have a good day :)

Step-by-step explanation:

Answer:

C. just choose C. if it isn't right just tell me.

Answer:

the answer would be-

Step-by-step explanation:

The probability that a person who walks by Tanisha has a pet- 0.8

The probability that a person who walks by Tanisha does not have a pet- 0.2

Probability is a mathematical term, which can be defined as the ratio of the number of favorable outcomes to the total number of outcomes of an event.

Probability of Event = Favorable Outcomes/Total Outcomes = X/n

Part A. The probability that a person who walks by Tanisha has a pet can be calculated by dividing the number of people who have a pet by the total number of people who walk by her. In this case, 16 out of 20 people have a pet, so the probability is:

P(having a pet) = 16/20 = 4/5 = 0.8

So, the probability that a person who walks by Tanisha has a pet is 0.8 or 80%.

Part B. The probability that a person who walks by Tanisha does not have a pet can be calculated by subtracting the probability of having a pet from 1. That is:

P(not having a pet) = 1 - P(having a pet)

P(not having a pet) = 1 - 0.8

P(not having a pet) = 0.2

So, the probability that a person who walks by Tanisha does not have a pet is 0.2 or 20%.

To know more about Probability check:

https://brainly.com/question/30034780

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Answer:

[tex]\frac{42}{19}[/tex] or [tex]2 \frac{4}{19}[/tex]

Step-by-step explanation:

5 1/4 divided by 2 3/8 basically means [tex]5 \frac{1}{4}[/tex]  ÷ [tex]2\frac{3}{8}[/tex]. Reduce the expression by cancelling the common factors.

Answer:

Circumference formula:

π is the constant and π = 3.14

Círclє Díαmєtєr Círcumfєrєncє

( A ). 3 cm 9.42 cm

( B ). 10 cm 31.40 cm

( C ). 7.64 cm 24 cm

( D ). 5.73 cm 18 cm

( E ). 1 cm 3.14 cm.

◈ Circumference of circle = π × diameter

◈ Diameter of circle = Circumference of circle / π

usíng vαluє σf π = 3.14

( A ) Díαmєtєr = 3 cm

Círcumfєrєncє = 3.14 × 3 = 9.42 cm.

( B ) Díαmєtєr = 10 cm

Círcumfєrєncє = 3.14 × 10 cm = 31.40 cm.

( C ) Círcumfєrєncє = 24 cm

Díαmєtєr = 24 / 3.14 cm = 7.64 cm.

( D ) Círcumfєrєncє = 18 cm

Díαmєtєr = 18 /3.14 = 5.73 cm.

( E ) Díαmєtєr = 1 cm

Círcumfєrєncє = 3.14 × 1 cm = 3.14 cm.

The probability of picking a tile that is the letter V from the second bag is: As a fraction: 250/500 = 1/2 and As a percent: (1/2) x 100% = 50%.

Probability is a measure of the likelihood that an event will occur. It is a number between 0 and 1, with 0 indicating that the event is impossible and 1 indicating that it is certain. The closer the probability is to one, the more likely it is that the event will occur.

Probability can be used to make predictions and decisions in a variety of fields such as finance, statistics, and so on.

It is also an important concept in comprehending probability laws and the behaviour of random events.

The probability of picking a tile that is the letter V from the second bag is:

As a fraction: 250/500 = 1/2

As a percent: (1/2) x 100% = 50%

Thus, comparing the probabilities, the second bag is more likely to contain a tile with the letter V since the probability of picking a V from the second bag is higher (1/2 or 50%) than from the first bag (7/25 or 28%).

For more details regarding probability, visit:

https://brainly.com/question/30034780

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Answer:

For question 2, it is C) 3a.

For question 3, it is B) 3.

Step-by-step explanation:

For question 2, we are given that Mary's age is a and her mother's age is 3 times as old as Mary. The key word is "times" so this means that the expression can be written as 3a or 3 * a.

For question 3, the question asks for the greatest number that divides evenly into both 42 and 81. Using simple math, C and D automatically elliminates itself because one of the numbers divided gives a whole and the other gives a decimal. All is left is A and B. Obviously, a number divided by one will by itself so it stays even either way and the two numbers divided by 3 will give us two whole numbers and 3 is the greatest possible number so that concludes that it is B.

Answer:

The independent variable is the the distance they walk and the dependent variable is the amount of time it takes them.

Step-by-step explanation:

this is because the walking distance the variable that is being controlled by the people and the time is the outcome from the distance

Step-by-step explanation:

[tex]452 \\ \times 36[/tex]

16272

Answer:

16,272

Step-by-step explanation:

And a product is what the answer to a Multiplication problem is called

Answer:

D

Step-by-step explanation:

It says less than do I think it should be d

Sorry if I am wrong

Answer:

For x = -6

Step-by-step explanation:

1.5x + 5 = -4

1.5x = -4 - 5

1.5x = -9

x = -6

Checking: 1.5 * -6 + 5 = -4