All categories

3 years ago

Plzzzzz Help me 10 points and will mark brainiest

Mathematics

2 answers:

vladimir1956 [14]3 years ago

8 0

Answer:

x=21

Step-by-step explanation:

We can use a ratio to solve

45 27

------ = ----------

35 x

Using cross products

45x = 35*27

45x = 945

45x/45 = 945/45

x =21

Anuta_ua [19.1K]3 years ago

3 0

Answer:

Step-by-step explanation:

The ratio of A to B is 45 / 35, which is equal to 9 / 7. To get from B to A, the ratio is 7 / 9.

(7 / 9) x 27

7 x 27 = 189, 189 / 9 = 21

Brainliest, please!

You might be interested in

Help Plzzzzzzzzzzzzzzzzzzz

mars1129 [50]

$(x+3)^{2}=19$

7 0

3 years ago

Find the remainder when f(x)=2x^3-x^2+x+1 is divided by 2x+1

Taya2010 [7]

Answer:

Step-by-step explanation:

By the remainder theorem, this is the same as finding f(-1/2), which is equal to 0.

8 0

2 years ago

Which function represents the graph of y=4^x −1 ? q r s t

max2010maxim [7]

y=4^x −1

x intercept is the point when y = 0, so you sub in 0 for y:

0 = 4^x - 1

4^x = 1

Any number excluding 0 that is raised to the the exponent 0 always equals 1, 0^0 is undetermined.

x = 0

x intercept = (0,0)

If the x intercept is at the origin (0,0) than the y intercept is also (0,0)

s is the only line that passes through (0,0)

5 0

3 years ago

Question 15 of 15Taniah is trying to find the area of the following square whereWY=10. What is the area?

joja [24]

The area of a square given its diagonal (d) is computed as follows:

$A=\frac{1}{2}d^2$

In this case, the diagonal is 10 units long, then the area is:

$\begin{gathered} A=\frac{1}{2}\cdot10^2 \\ A=\frac{1}{2}\cdot100 \\ A=50\text{ square units} \end{gathered}$

8 0

1 year ago

In a study by Peter D. Hart Research Associates for the Nasdaq Stock Market, it was determined that 20% of all stock investors a

Pani-rosa [81]

Answer:

0.0545 = 5.45% probability that exactly seven are retired people.

Step-by-step explanation:

For each stock investor, there are only two possible outcomes. Either they are retired people, or they are not. Stock investors are independent. This means that we use the binomial probability distribution to solve this question.

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.

20% of all stock investors are retired people.

This means that $p = 0.2$

a. What is the probability that exactly seven are retired people?

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

$P(X = 7) = C_{20,7}.(0.2)^{7}.(0.8)^{13} = 0.0545$

0.0545 = 5.45% probability that exactly seven are retired people.

4 0

3 years ago