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3 years ago

3/4 of ... is 15/28 what is the ...

Mathematics

2 answers:

grandymaker [24]3 years ago

8 0

The answer would be 2/5

Lelechka [254]3 years ago

3 0

Answer:

2/5

Step-by-step explanation:

Hope you have a good day! :)

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1. The ordered pair (-1, -1) is a solution of the system -4x + 2y = 2 and x + y = -2.

Nastasia [14]

1: (-1,-1) is (x, y) to see if it is a solution, you would just plug in x and y and see if the equation is true.
-4 (-1) + 2(-1) = 2
4 + -2 = 2
2 = 2 CORRECT
So... plug in x and y in the second equation to Make sure it works for that one too.
-1 + -1 = -2
-2 = -2 CORRECT
So, yes. (-1,-1) is a solution to both equations.

5 0

3 years ago

John simplified 2 square root of 96 to get an answer of 4 square root 24

Oksanka [162]

Answer:

Step-by-step explanation:

2√96 = 2* √(4 * 24)

= 2*2√24

= 4√24

That is equal to 2√96 but a simpler result is:

4√24 = 4 * √4*√6

= 4 *2 √6

= 8√6

4 0

3 years ago

On a 120-question test, a student got 84 correct answers. What percent of the problems did the student work correctly

Anon25 [30]

Answer:70%

Step-by-step explanation:

3 0

4 years ago

see I was genius in my country india website and here no one is answering me when I am in so hurry you know. I am losing marks h

Arte-miy333 [17]

Answer:

sorry for that! did you ask a question earlier?

8 0

3 years ago

Read 2 more answers

A large disaster cleaning company estimates that 30 percent of the jobs it bids on are finished within the bid time. Looking at

Y_Kistochka [10]

Answer:

There is a 13.61% probability that exactly 4 of the jobs were not completed within the bid time.

Step-by-step explanation:

For each job, there are only two possible outcomes. Either they are completed on time, or they are not. This means that we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

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

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

And p is the probability of X happening.

Looking at a random sample of 8 jobs that it has contracted, calculate the probability that exactly 4 of the jobs were not completed within the bid time.

There are 8 jobs, so $n = 8$ .

30% of them are finished on time, which means that 70% are not completed within the bid time. This means that $p = 0.7$

The problems asks for P(X = 4). So

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 4) = C_{8,4}.(0.7)^{4}.(0.3)^{4} = 0.1361$

There is a 13.61% probability that exactly 4 of the jobs were not completed within the bid time.

4 0

4 years ago