MATHEMATICS HIGH SCHOOL

Tiana can clear a football field of debris in 3 hours. Jacob can clear the same field in 2 hours. If they decide to clear the field together, how long will it take them?50 minutes
1 hour 5 minutes
1 hour 12 minutes
5 hours

Answers

Answer 1
Answer: The answer is D. 5 hours, due to the fact that there football field together, so adding there times they had done the football field individually,                            Tiana,3 hours, and Jacob 2 hours                                                                               2h+3h=5hours. hope i helped.

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The value of Maggie's car decreased by 20% since last year, when she bought it. If the car is now worth $15,000.00, how much was the car worth when she bought it? A. $20,000.00 B. $17,647.06 C. $18,000.00 D. $18,750.00
There are three consecutive numbers such that twice the first is 20 more than the second.find the numbers? Show your solution.
Complete answer choices

A physician conducts a survey among 100 patients suffering from migraine headaches to assess the range of headache severity among his patients. What kind of data analysis would he apply to interpret the results obtained from this survey?A) Quantitative and descriptive
B) Quantitative and inferential
C) Qualitative and descriptive
D) Qualitative and inferential

Answers

The correct answer should be D) Qualitative and inferential

That is because he does not use quantity, but rather the quality of the migraines to create an opinion on the matter. The severity helps him infer what needs to be done.

Answer:

D

Step-by-step explanation:

the price of n tickets to a play is 9n+ 6 dollars. What is the cost in dollars for 8 tickets to the play

Answers

9(8)+6

72+6

78


78$ is the cost of 8 tickets.
put n = 8 and solve it u will get answer

9 (8) + 6
72 + 6
$78

Four people in a room. Each shakes hands with each of the others once. How many handshakes are there? 6
10
12
16
22

Answers

The correct answer is 6.

The clearest way to determine this is by creating a table of possible hand shaking. If we label the people A-D, the following are the ways they can be combined:
AB
AC
AD
BC
BD
CD

There are no other combinations.

There are 6 handshakes betweenfour people in the room.

Further explanation

The probability of an event is defined as the possibility of an event occurring against sample space.

\large { \boxed {P(A) = \frac{\text{Number of Favorable Outcomes to A}}{\text {Total Number of Outcomes}} } }

Permutation ( Arrangement )

Permutation is the number of ways to arrange objects.

\large {\boxed {^nP_r = (n!)/((n - r)!) } }

Combination ( Selection )

Combination is the number of ways to select objects.

\large {\boxed {^nC_r = (n!)/(r! (n - r)!) } }

Let us tackle the problem.

This problem is about Combination.

If there are 4 people in a room , then the number of handshaking between 2 people is analogy as selecting 2 people from 4 people available. We will use combination formula in this problem.

^4C_2 = (4!)/(2! (4-2)!)

^4C_2 = (4!)/(2! 2!)

^4C_2 = (4 * 3 * 2 * 1)/(2 * 1 * 2 * 1)

^4C_2 = ( 24 )/(4)

^4C_2 = \boxed{6}

Learn more

Answer details

Grade: High School

Subject: Mathematics

Chapter: Probability

Keywords: Probability , Sample , Space , Six , Dice , Die , Binomial , Distribution , Mean , Variance , Standard Deviation

The value of y varies directly with x and y = 4.5 when x = 0.5. find y when x = 10

Answers

So what you asked this is what I got

x(y) = 4.5

If x= 0.5 then 

0.5(y) = 4.5
y=9

x(y) = 4.5

10(y) = 4.5
y= 0.45



hope this helps :)

A car is traveling at a rate of 90 kilometers per hour. what is the car rate in kilometers per minute. how many kilometers can the car travel per 20 minutes?

Answers

The car rate in km/min is found by,
90km / 60mins = 1.5 (km)/(mins)
Then the car will travel this in 20mins,
1.5 (km)/(mins) * 20mins = 30km

A test is worth 50 points. Multiple- choice questions are worth 1 point, and short answer questions are worth 3 points. if the test has 20 questions, how many multiple-choice questions are there?A. m + 3s =20
B.m + 3s + 20 =50
C. m + 3s = 50
D. m + s + 50

Answers

Correct answer is C. 
m + 3s = 50 
the total number of questions is 20. since the paper is made of only multiple choice and short answer questions, the sum of the multiple choice and short answer questions should be 20.
since multiple choice is 'm' and short answer is 's'
then m + s = 20
but theres no option for that 
if we take the number of points 
points for 1 multiple choice question - 1
then points for m number of multiple choice questions = 1 * m = m
points for 1 short answer - 3
then points for s number of short answer question = 3 * s = 3s
then total number of points = m + 3s
and the total number of points = 50
therefore 
m + 3s = 50
this is the correct answer C.

Answer with Step-by-step explanation:

Points for 1 multiple choice question = 1

Then, points for m number of multiple choice questions = 1 × m = m

Points for 1 short answer = 3

Then points for s number of short answer question = 3 ×s = 3s

Total number of points = m + 3s

and the total number of points = 50  

i.e. m + 3s = 50

Hence, correct option is:

C. m+3s=50
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