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inysia [295]
2 years ago
13

9) EASY POINTS WILL GIVE BRAINLIST TO BEST ANSWERS

Mathematics
2 answers:
Simora [160]2 years ago
7 0
1(5) + 4(X) = 25
5 + 4X = 25
subtract 5 from both sides
4X = 25 - 5
4X= 20
divide both sides by 4
X = 20/4
x=5
Each eraser cost 5$
ra1l [238]2 years ago
3 0
You bought a magazine for $5 and four erasers. you spent a total of $25.

Magazine cost: 5$ each
Eraser cost: X$ each

Total cost is the number of items (1 magazine) times the cost of each item (5$). We don't know the cost of each eraser, so we represent that using a variable, X.

1(5) + 4(X) = 25

5 + 4X = 25

subtract 5 from both sides

4X = 25 - 5

4X = 20

divide both sides by 4

X = 20/4

X = 5

Each eraser cost 5$
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How can you determine if you need to use a combination or permutation to count the number of outcomes? Which will usually have m
Nadya [2.5K]

Answer with Step-by-step explanation:

Permutation : It is an arrangement of r elements out of n elements.

Combination : it is a selection of r element out of n elements .

Suppose we have a set

S={1,2,3}

If two elements are taken at a time then

Using permutation formula

Total number of outcomes=3P_2

Total number of outcomes=\frac{3!}{(3-2)!}

Total number of outcomes=3!=3\times 2\times1=6

Using combination formula

\binom{n}{r}=\frac{n!}{r!(n-r)!}

Total number of outcomes=\binom{3}{2}=\frac{3!}{2!1!}

Total number of outcomes=\frac{3\times2!}{2!}

Hence, total number of outcomes=3

Total number of outcomes determined by permutation have more outcomes.

Because permutation is an arrangement of elements  therefore, it consider order of arrangement of element   but combination is a selection of elements it does no consider order of elements

Arrangements of two elements out of 3 elements

{1,2},{2,3},{2,1},{3,2},{1,3},{3,1}

By using combination if two elements taken at a time then combination

{1,2},{2,3},{1,3}

4 0
3 years ago
The volume formula of a right pyramid is V= 1/3 Bh. What does B represent?
tino4ka555 [31]

Answer:

B is the area of the base

Step-by-step explanation:

V= 1/3 Bh

V is the volume

B is the area of the base

h is the height of the pyramid

4 0
3 years ago
Read 2 more answers
Can someone help me with this
Dennis_Churaev [7]

Answer:

The equation for your graph is Y=2x+1

4 0
3 years ago
For the given points a(-4 6) and b(6 -4) find the slope of a line through points A and B
kap26 [50]

Answer:

the required slope of the points is -1...

3 0
4 years ago
Find the volume of the cylinder
Alexxx [7]

Answer:

47

Step-by-step explanation:

the formula is πr²h/3= pi=22/7, so 22/7x 3x 5/3= 47.12389 simplified= 47

3 0
3 years ago
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