3 years ago

Can someone please help meeee ?

Mathematics

1 answer:

nataly862011 [7]3 years ago

5 0

It could possibly be the first on but I’m not completely sure

You might be interested in

Solve.

lions [1.4K]

Answer:

b=9,a=12

Step-by-step explanation:

I solved by substitution:

b = 3/4a ---> plug this into the other equation

a + b = 21 is now a + 3/4a = 21

Reduce: 7/4a = 21

a = 12

Now solve for b:

b=3/4a is now b=3/4(12)

b=9

6 0

2 years ago

Read 2 more answers

Can someone solve for x

makkiz [27]

-5 because -5 plus 42 equals 37

7 0

2 years ago

Read 2 more answers

If a student scored 75 points on a test where the mean score was 83.5 and the standard deviation was 6.1. the student's z score

Delvig [45]

Answer: ( -1.5)

have a nice day:)

8 0

2 years ago

Read 2 more answers

Help binomial distributions

Ymorist [56]

We have the formula to compute the probability of having exactly k successed over n trials, given a probability p of success (and implicitly a probability 1-p of failure), which is

$P(\text{k successed on n trials}) = \binom{n}{k}p^k(1-p)^{n-k}$

Now, the probability of at least 3 successes is the union of the following event: exactly three successes,exactly four successes and exactly five successes.

We can compute their probability and sum them: $\binom{5}{3}\left(\frac{3}{7}\right)^3\left(\frac{4}{7}\right)^2 + \binom{5}{4}\left(\frac{3}{7}\right)^4\left(\frac{4}{7}\right)^1 + \binom{5}{5}\left(\frac{3}{7}\right)^5 \approx 0.36788$

So, the answer is about 36.79%

3 0

2 years ago

What is the Graph of f(x)=2x^2

Sergio039 [100]

See attachment for your your Answer

8 0

3 years ago