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3 years ago

All of the following are ways to write 25 percent of n except

Mathematics

2 answers:

CaHeK987 [17]3 years ago

6 0

D. D would mean 25 x n, but all the others are equivalent to 0.25n etc.

Hope I helped!

e-lub [12.9K]3 years ago

5 0

D is the correct answer

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Tia, Leah, and Tim all solve the problem 3(-x + 4) = -3x - 12. Tia solved and decided that the solution is x= 4. Leah solved the

nexus9112 [7]

Answer:

Tina

Step-by-step explanation:

bc if you sub in 4 for x the equations on both sides are 0

check:

-4 + 4 = 0 -3 x 4 = -12

0 x 3 = 0 12 + -12 = 0

0 = 0

please mark this as brainiest!!!!

5 0

3 years ago

(_x2) + (_x3)=12 In four different ways

il63 [147K]

If you substitute a variable for each blank, for example x*2+x*3 you get 5x=12, which can then be solved to get that x=12/5, so 12/5 is the answer.

3 0

3 years ago

Consider a triangle with angles 30o-60o-90o, with hypotenuse of length 2. Calculate the lengths of the other 2 sides and store t

kumpel [21]

Answer:

1.00 and 1.73

Step-by-step explanation:

1) Calculating the 1st and the 2nd leg using trigonometric function sine:

$sin (30^{0})=\frac{c}{2}\Rightarrow \frac{1}{2}=\frac{c}{2}\Rightarrow 2*\frac{1}{2}=2*\frac{c}{2}\Rightarrow c=1\\sin(60^0)=\frac{b}{2}\Rightarrow \frac{\sqrt{3}}{2}=\frac{b}{2}\Rightarrow b=\sqrt{3}\Rightarrow\: b\approx \:1.73$

Once one leg is found there is another way to find the other leg, using Pythagorean Theorem too.

$a^{2}=b^{2}+c^{2}\Rightarrow 2^{2}=b^{2}+1^{2}\Rightarrow 4-1=b^{2}\Rightarrow b=\sqrt{3} b\approx 1.73$

Sides

a hypotenuse: 2.00

-------------------------------

b leg: 1.73

--------------------------------

c leg: 1.00

--------------------------------

4 0

3 years ago

What is 6 5/8 - 4 3/4 =

Tamiku [17]

Answer:

1.875

Step-by-step explanation:

6 0

3 years ago

Suppose a university is divided into three campuses: the Main campus, the Downtown campus, and the Bay Area campus. The Main cam

rewona [7]

Answer:

a) 0.0835 = 8.35% of students at the university are statistics majors

b) 0.8623 = 86.23% are at the Main campus

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

This is used for item b.

a. What proportion of students at the university are statistics majors?

12% of 60%(At the main campus).

4% of 25%(Downtown campus).

The rest is 100 - 60 + 25) = 15%.

1% of 15%(Bay Area Campus). Si

$p = 0.12*0.6 + 0.04*0.25 + 0.01*0.15 = 0.0835$

0.0835 = 8.35% of students at the university are statistics majors.

b. Of all statistics majors at the university, what proportion are at the Main campus?

Using conditional probability to find the percentage.

Event A: Statistics majors, so $P(A) = 0.0835$

Event B: Main Campus

Intersection of A and B:

12% of 60%. So

$P(A \cap B) = 0.12*0.6 = 0.072$

Percentage:

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.072}{0.0835} = 0.8623$

0.8623 = 86.23% are at the Main campus

8 0

3 years ago