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3 years ago

I really need helpp!! im soo tired.

Mathematics

1 answer:

Anastasy [175]3 years ago

6 0

Answer:

x = 30°

Line NB is parallel to line ML

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In a certain Algebra 2 class of 25 students, 13 of them play basketball and 11 of them play baseball. There are 4 students who p

Flauer [41]

Answer:

$\frac{4}{5}$

Step-by-step explanation:

Given: There are 2 classes of 25 students.

13 play basketball

11 play baseball.

4 play neither of sports.

Lets assume basketball as "a" and baseball as "b".

We know, probablity dependent formula; P(a∪b)= P(a)+P(b)-p(a∩b)

As given total number of student is 25

Now, subtituting the values in the formula.

⇒P(a∪b)= $\frac{13}{25} +\frac{11}{25} -\frac{4}{25}$

taking LCD as 25 to solve.

⇒P(a∪b)= $\frac{13\times 1+11\times 1-4\times 1}{25} = \frac{20}{25}$

∴ P(a∪b)= $\frac{4}{5}$

Hence, the probability that a student chosen randomly from the class plays both basketball and baseball is $\frac{4}{5}$ .

6 0

3 years ago

Which of the following are identities? Check all that apply. A. cot2x + 1 = csc2x B. tan2x = 1 - sec2x C. sin2x = 1 + cos2x D. s

kirill115 [55]

I'll assume those are squares. We know D is an identity:

$\sin^2 x + \cos ^2 x = 1$

Dividing through by $\sin ^2 x$

$1 + \cot^2 x = \csc^2 x$

That's A.

Dividing the original through by $\cos ^2 x$

$\tan^2 x + 1 = \sec^2 x$

Not quite B, wrong sign on tangent.

C has the wrong sign on cosine squared as well.

Identities: A & D

4 0

3 years ago

15. Solve: 21-3y=36-6y A) 19 B) 5 C) -5/3 D) -19

juin [17]

21-3y=36-6y +3y
21 = 36 - 3y -36
-36+21 = -3y
- 15 = - 3y ÷ -3
5 = y

Choice: B

6 0

3 years ago

Read 2 more answers

This time you are going to enter you answer differently. Recall the factors of 12 are 1, 2, 3, 4, 6, 12. You will enter this as

mafiozo [28]

Answer:

2,3,6

Step-by-step explanation:

those are the only positive factors in there

5 0

2 years ago

I really need help with this one

Evgen [1.6K]

Answer:

a=70 b=.16 c=350

Step-by-step explanation:

50 messages is 8 dollars

6 0

3 years ago