Jessica wants to take three books on vacation with her. She has five books to choose from. How many possible combinations of thr
ee books could she take on vacation?
2 answers:
Answer:
We use the combination formula:
combinations = n! / r! * (n-r)!
n = 5 and r =3
combinations = 5! / 3! * 2!
combinations = 5! / 12
combinations = 5 * 4 * 3 * 2 * 1 / 12
combinations = 5 * 2 = 10
Step-by-step explanation:
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Answer:
2
Step-by-step explanation:
6 plus 7 equals 13
9 plus 9 equals18
18 subtract 6 equals 13
13 subtract 12 equals 1
The answer is 30.
You need to use sine here
So:
The sixth angle would measure 127°
The length of side A in centimeters is 6cm
D. 6
Answer:
width=3
length=9
Step-by-step explanation:
1/2 perimeter: 24/2=12
let x: width; y: lenght
y=2x+3
x=12-y
y=2(12-y)+3
y=24-2y+3
y+2y=27
y=9
x=12-9=3
