1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Maru [420]
2 years ago
9

Plshelp itsmathim gonnafaillll pls help

Mathematics
1 answer:
antoniya [11.8K]2 years ago
6 0
Tbh I’m a 90 old man
You might be interested in
A set of raw paired sample data is given below. Convert this raw data into paired ranks, and calculate the value of the rs test
SOVA2 [1]

here is the data set for the complete question

x: 18 21 19 21 20 21

y; 2 14 5 6 18 18

Answer:

B. 0.652

Step-by-step explanation:

x   y   rank of x     rank of y   d         d²

18   2     1                1               0          0

21   14    4                4             0          0

19    5     2               2             0          0

21    6     4               3            1            1

20    18    3             5.5         -2.5      6.25

21     18    4             5.5          -1.5       2.25

∑d² = 8.5

rs = 1 - 6[∑di² + ∑m(m²-1)]/n(n²-1)

= 1 - 6[8.5 +{3(3²-10/12 + 2(2² - 1)/12}]/6(6²-1)

= 1 - 0.348

= 0.652

therefore option b is the right answer.

5 0
3 years ago
Y is inversely proportional to x.
Inessa [10]

Answer:

1. xy = 63

2. y = 3

Step-by-step explanation:

Given

Variation: inverse Proportion

y = 7, x = 9

Required

- Write an equation connecting y and x

- Find y when x = 21

Given that thee variation is inversely proportional;

This implies that

y\ \alpha\ \frac{1}{x}

Convert variation to equation

y\ = \frac{k}{x} ----------- Equation 1

Where k is the constant of variation

Substitute 7 for y and 9 for x in equation 1

7 = \frac{k}{9}

Multiply both sides by 9

9 * 7 = 9 * \frac{k}{9}

63 = k

Substitute 63 for k in equation 1

y = \frac{63}{x}

Multiply both sides by x

x * y = \frac{63}{x} * x

xy = 63

Hence, the equation connecting x and y is xy = 63

Solving for when x = 21

Substitute 21 for x in the above equation

21 * y = 63

Divide both sides by 21

\frac{21 * y}{21} = \frac{63}{21}

y = 3

4 0
3 years ago
Imagine the United States only had two postage stamps, a 3 cent stamp and a 7 cent stamp. If you can put any number of stamps on
cricket20 [7]

Answer:

  • not possible:  1, 2, 4, 5, 8, 11
  • possible: all others

Step-by-step explanation:

Obviously, all multiples of 3 and 7 can be paid.

1 cent can be added by adding a 7-cent stamp and taking away two 3-cent stamps. 2 cents can be added by adding three 3-cent stamps and taking away one 7-cent stamp. Hence any value more than 7 +2(3) = 13 cents can always be accommodated.

Amounts that are impossible:

  1, 2, 4, 5, 8, 11 cents

All other positive integer amounts are possible.

7 0
3 years ago
11. A recipe calls for 1/2
andreyandreev [35.5K]

Answer:

if jack uses 10 cups of sugar he will need to use 6 tsp of vanilla extract

Step-by-step explanation:

10 devided by 2 1/2= 4

and 1/2 multiplied by 4 is 6

3 0
2 years ago
Read 2 more answers
In a class of students, the following data table summarizes how many students have a brother or a sister. What is the probabilit
kondor19780726 [428]

Answer:

22/29

Step-by-step explanation:

Idk

6 0
3 years ago
Other questions:
  • Find the length of the arc shown in brown. Leave your answer in terms of pi.
    13·2 answers
  • CAN SOMEONE PLEASE HELP ME???
    12·1 answer
  • Which equation can be used to solve the problem?<br> 10 is 50 percent of what number?
    5·2 answers
  • - Shelia went snowboarding. She spent $118
    14·2 answers
  • the slope of the line below is -4 write a point-slope equation of the line using the coordinates of the labeled point
    9·2 answers
  • Angle A is circumscribed about circle O. What is the measure of angle O? 46
    9·1 answer
  • A bacteria culture begins with 13 bacteria that triple in amount at the end of every hour. How many bacteria exist in the cultur
    9·1 answer
  • 31. Which number is both a factor of 60 and a multiple of 3? Select three that apply.
    13·1 answer
  • What is the y-intercept of the equation y = 2x + 5
    6·2 answers
  • Sandra bought 3 pounds of sweet potatoes for $4.89. What is the cost per pound of the sweet potatoes?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!