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kipiarov [429]
4 years ago
13

What is 7/8 - 4/5 = what is 7/8 - 4/5

Mathematics
2 answers:
s344n2d4d5 [400]4 years ago
6 0
The answer is 3/40 7-4
monitta4 years ago
3 0
First find common denominators and do the same to the numerators.

4/5 = 32/40
7/8 = 35/40

35/40 - 32/40 = 3/40
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Given A = (3, -2 ) and B = (1, - 1) find A + B PLS HELP LOL
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3 years ago
What is the slope and y-intercept of the linear function y=5x?​
Wittaler [7]

Answer:

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Step-by-step explanation:

6 0
3 years ago
A group of 8 friends (5 girls and 3 boys) plans to watch a movie, but they have only 5 tickets. If they randomly decide who will
Eddi Din [679]

Answer:

D. 0.821

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

The combinations formula is important to solve this question:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

Desired outcomes

The order is not important. For example, Elisa, Laura and Roze is the same outcome as Roze, Elisa and Laura. This is why we use the combinations formula.

At least 3 girls.

3 girls

3 girls from a set of 5 and 2 boys from a set of 3. So

C_{5,3}*C_{3,2} = 30

4 girls

4 girls from a set of 5 and 1 boy from a set of 3. So

C_{5,4}*C_{3,1} = 15

5 girls

5 girls from a set of 5

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D = 30+15+1 = 46

Total outcomes

5 from a set of 8. So

T = C_{8,5} = 56

Probability

P = \frac{D}{T} = \frac{46}{56} = 0.821

So the correct answer is:

D. 0.821

6 0
3 years ago
Read 2 more answers
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zubka84 [21]
Just make the slope as 1/2 remember rise over run and start at 0
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4 years ago
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