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faltersainse [42]
2 years ago
6

A fast typist can type 120 words in 100 seconds. In 180 seconds, how many words could be typed?

Mathematics
1 answer:
Kitty [74]2 years ago
4 0
100 seconds --- 120 words 
180 seconds --- x words

x= \cfrac{180*120}{100}=18*12=216 \  \text{words}
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A physics class has students. Of​ these, students are physics majors and students are female. Of the physics​ majors, are female
zloy xaker [14]

Answer:

The probability that a randomly selected student is female or a physics major is <u>0.65</u>.

Step-by-step explanation:

Note: This question is not complete. A complete is therefore provided before answering the question as follows:

A physics class has 40 students. Of these, 14 students are physics majors and 18 students are female. Of the physics majors, six are female. Find the probability that a randomly selected student is female or a physics major. The probability that a randomly selected student is female or a physics major is_______.

The Step-by-step explanation is therefore provided now as follows:

The probability that a randomly selected student is female or a physics major can be calculated using the following formula:

P(PM or F) = P(PM) + P(F) - P(PMF)

Where;

P(PM or F) = Probability of student selected is Physics Major or Female = ?

P(PM) = Probability of student selected is Physics Major = Number of Physics Major / Total number of students in the Physics class = 14 / 40 = 0.35

P(F) = Probability of student selected is Female = Number of female students in the Physics class / Total number students in the Physics class = 18 / 40 = 0.45

P(PMF) = Probability of student selected is Physics Major and Female = Number Physics Major that female in the Physics class / Total number students in the Physics class = 6 / 40 = 0.15

Substituting the values into equation (1), we have:

P(PM or F) = 0.35 + 0.45 - 0.15 = 0.65

Therefore, the probability that a randomly selected student is female or a physics major is <u>0.65</u>.

3 0
3 years ago
Select all of the solutions to x - 6 = -x². If there are no solutions, check the empty set. -3 -2 2 3
Yuki888 [10]

Answer:

-3 and 2

Step-by-step explanation:

put : x =  - 3 in this equation :  x - 6 = -x².

- 3 - 6 = - (- 3)²

-9 = -9  .....true

now put x = 2

2 - 6 = - (2)²

- 4 = - 4......true

7 0
3 years ago
14. The table shows the survey results of exercises
Akimi4 [234]

Answer:

Answers in the question are A, B, and E.

The answers to the table are:

         yes     no     total

yes:     12      25      37

no:      12       6        18

total:   24      31       55

Hopefully this helped, sorry if I was too late :)

3 0
2 years ago
This is due by 3 today so answer fast <br><br> Classify the pair of angles:
UkoKoshka [18]

Answer:

Complementary angles

Step-by-step explanation:

Complimentary angles are 2 angles that sum up to 90 degrees

8 0
3 years ago
Selma's cell phone plan charges $0.14 per minute. The first month her total cost was $6.72. How many minutes did she use? Questi
Alex73 [517]
Your answer is 48 minutes because you divide 6.72 by 0.14
7 0
3 years ago
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