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Ann [662]
3 years ago
15

You have a set of 21 songs. How many different groups of 17 could you make?

Mathematics
2 answers:
Vesna [10]3 years ago
8 0
C(21,17) = 21*20*19*18/4*3*2 = 215460
Evgen [1.6K]3 years ago
4 0
1.

21- 17 = 4

only 1 group
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Please help I don't understand
valina [46]
17) The line that is John is closer to certain but not exactly on certain so I'd say it's "likely"

18) Using that same example as the one above, if 0 means impossible, then 1 means certain. I'd place your label for Sara at 1. 

19) Let s = sides of the square. There are 4 sides and all sides are equal so we can set up the equation 4s = 64. Divide both sides by 4. s =  16. Now add 2 to this. 16 + 2 = 18. The length of each side of the original square was 18.

20) If the scale is 1 cm : 1 meter and the height of the model is 16 cm, then the actual plane must be 16 meters. 

21) 2x and 100 are supplementary angles meaning together they must add up to 180.

2x + 100 = 180
2x = 180 - 100
2x = 80
Divide both sides by 2
x = 40

22) Assuming 3x is supposed to be the right angle, right angles are 90 degrees. 

3x = 90
Divide by 3 on both sides
x = 30. 
6 0
4 years ago
Please helpp meeee!!!!
nata0808 [166]

Answer: The answer is                                       because                                                 , hope this helps :)

Step-by-step explanation:

6 0
3 years ago
Could i please get some help?
stepladder [879]
1: slope = 2/1 or 2
2: slope = 5/-5
3: slope = 3/2
4: slope = 7/-4
5: slope = 3/5
6: slope = 2/-8
7: slope = 6/2 or 3
8: slope = 2/-4
9: slope = 1/6
7 0
3 years ago
Evaluate this exponential expression 7 • (6+2)^2 - 3^2=
Lelu [443]

Answer: 441

Step-by-step explanation:

7*(6+2)^2-3^2

7*8^2-3^2

7*64-9

448-9

441

3 0
2 years ago
You start at (4,4). You move up 1 unit and left 7 units. Where do you end?
yaroslaw [1]

Answer: i believe it would be (-3 , 5)

Step-by-step explanation:

Correct me if im wrong

4 0
4 years ago
Read 2 more answers
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