MATHEMATICS COLLEGE

Twenty-one less than a number is seven. What is the number?
3
14.
28
147

Answers

Answer 1
Answer:

Answer: the answer will be 28

Step-by-step explanation:

First you have to add 21+7 which equals to 28 and that's how I got my answer.

Please mark me brainiiest.
Answer 2
Answer:

Answer:

28

Step-by-step explanation:

add 7 + 21

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Sketch the region R defined by 1 ≤ x ≤ 2 and 0 ≤ y ≤ 1/x^3 .a. Find (exactly) the number a such that the line x = a divides R into two parts of equal area.b. Then find (to 3 decimal places) the number b such that the line y = b divides R into two parts of equal area.

Which of the following is least like the others? Exit Test A road B street C highway D trail

Answers

A exit test because that's the one I think is right
A mark or a series of signs or objects left behind by the passage of someone or something is called trail whereas every other is place where we drive, transport

In short, Your Answer would be Option D

Hope this helps!

Cuánto le falta a 3/5para llegar a 9/10

Answers

Answer:

3/10

Step-by-step explanation:

3/5 se puede convertir en 6/10

(3x2)/(5x2).

9/10 - 6/10 = 3/10

le falta 3/10 para llegar a 9/10.

According to a recent​ study, 9.2​% of high school dropouts are​ 16- to​ 17-year-olds. In​ addition, 6.2​% of high school dropouts are white​ 16- to​ 17-year-olds. What is the probability that a randomly selected dropout is​ white, given that he or she is 16 to 17 years​ old?

Answers

Answer:

Step-by-step explanation:

So, out of a 100% students that drop out, 9,2% is in the range of 16-17 years of age. The conclusion would be, (92)/(1000) would express the probability of randomly picking a dropout that belong in this set of 16-17 year olds.

Notice that I put "1000" because I want a 0,0092 as a multiplier, because in probability, that represents "9,2%". You actually awnt to always put 100, because that's 100%, but this is just a trick, writing 9,2/100 still works.

Now, for the second bit of information you want to also include that "6,2% white students", which is a subset of the set of 16-17 year olds. and that's a probability, in of itself. Thus, you multiply these two probabilities.

What you want to plug, in your calculator, the follwing expression:

(9,2)/(100) (6,2)/(100)

This will give you a number, which you'll have to multiply by 100, to obtain the answer for your problem!

Final answer:

The probability that a randomly selected dropout aged 16 to 17 is white, given the provided statistics, is 67.39%.

Explanation:

The student is asking a question related to conditional probability in the field of Mathematics. The question prompts us to find out the probability that a randomly selected high school dropout in the age range of 16 to 17 is white. To find the answer, we use the following formula:

P(A|B) = P(A ∩ B) / P(B)

Where:
P(A|B) is the probability of event A happening given that event B has occurred.
P(A ∩ B) is the probability of both event A and event B happening together.
P(B) is the probability of event B happening.

From the problem statement, we know that P(B), the percentage of dropouts who are 16-17 years old, is 9.2%. Also, P(A ∩ B), the percent of dropouts who are both white and 16-17 years old, is given as 6.2%. We are supposed to find P(A|B), the probability that a dropout is white given that they are 16-17 years old.

Therefore, by substituting these values into the formula, we get:

P(A|B) = 6.2% / 9.2% = 67.39%

Rounded to two decimal places, the answer is 67.39%. So, there is approximately a 67.39% chance that a random high school dropout aged 16-17 is white.

Learn more about Conditional Probability here:

brainly.com/question/32171649

#SPJ2

A. 35/12
B. 12/37
C. 12/35
D. 35/37

Answers

Answer:

A

Step-by-step explanation:

Use the SOH CAH TOA

Tangent = Opposite / adjacent

tan (a) = 35 / 12

Answer:

the answer is obviously going to be a

In a rally race the lead car is ahead by 1 1⁄2 hours. If the lead car is going 60 mph and the second place car is going 70 mph and starts 1 1⁄2 hours after the lead car, how long will it take to overtake the leader?

Answers

Let t hours be the time the second car is driving untill it overtakes the first car. The nfirst car is t-1(1)/(2) hours on the road.

If the lead car is going 60 mph, then for the t-1(1)/(2) hours  it will go the distance

60\cdot(t-1(1)/(2))\ m.

If the second place car is going 70 mph, then for the hours it will go the distance

70\cdot t\ m.

These distances are equal, then

60(t-1(1)/(2))=70t,\n \n60t-60\cdot (3)/(2)=70t,\n \n10t=90,\n \nt=9\ hours.

Answer: 9 hours

I need help setting up this problem

Answers

R represents regular and F will represent recycled fibers. 
R + F = 27
46.99R + 61.99F = 1433.73 
This is how you would set the problem up to begin. Let me know if you need help from here!
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