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Maslowich
3 years ago
10

Count the possible combinations of 3 letters chosen from A, B, C, D. The possible combinations of 3 letters are __.

Mathematics
2 answers:
anygoal [31]3 years ago
8 0

Answer:

Step-by-step explanation:

We are given the letters:

2

We write the possible permutations of 3 letters from the given list:

3

Because order is not important in a combination we cross out the duplicate pairs:

4

siniylev [52]3 years ago
6 0

Answer:

4

Step-by-step explanation:

n! / r!(n-r)!

n = # of total objects

r = # grouped together at a time

4! / 3!(4-3)!

4

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An airplane travels 6903 kilometers against the wind in 9 hours and 8613 kilometers with the wind in the same amount of time. Wh
Rzqust [24]

Answer:

The rate of the plane is 862 miles per hour

Step-by-step explanation:

An airplane travels 6903 kilometers against the wind in 9 hours.

Speed = distance / time

Speed of the airplane while travelling against the wind is

6903/9 = 767 miles per hour

The airplane travelled 8613 kilometers with the wind in the same amount of time. This means that the speed while travelling with the wind will be

8613/9 = 957 miles per hour

Let x = speed of the airplane

Let y = speed of the wind

While travelling against the wind,

x - y = 767 - - - - - -- 1

While travelling with the wind,

x + y = 957 - - - - - - -2

Subtracting equation 2 from equation 1,

-y - y = 767 - 957

-2y = -190

y = -190/-2

y = 95 miles per hour

x = 957 - y

x = 957 - 95

x = 862 miles per hour

4 0
3 years ago
3. Determine whether the set of numbers can be the measures of the sides of a triangle. If so, classify the triangle as acute, o
julia-pushkina [17]

Answer:

all of them are acute

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3 0
3 years ago
Read 2 more answers
How does mathematics connect to the everyday life of an individual?
mr_godi [17]

Answer:

Math is considered to be a part in everyones life, for example, you use math to throw a ball, like the force you use, or the height of the ball. Math is an important concept, and is lingering in our everyday lives, but the reason we take math is to find out of its exsitence, and use it for engineering, etc.

Step-by-step explanation:

5 0
2 years ago
In a system of 2 equation with unknowns how many solutions are possible
vfiekz [6]
There are 2 solutions
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25 points!!<br> how are these shapes alike
Pie

Answer:

A. Each shape has 12 edges

Step-by-step explanation:

A is the only one that is true.

The shapes have 6 faces, not 7 or 8.

The edges are the places were two planes intersect, and there are 12, not 6.

7 0
3 years ago
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