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
erastova [34]
2 years ago
5

In A Quiz Team a Scores -30 , 10 , 40 .

Mathematics
1 answer:
VLD [36.1K]2 years ago
3 0

Answer:

Team B scored more. By 10.

(Team A) -30 + 10 = -20 + 40 = 20

(Team B) 30 + 10 = 40 + -10 = 30

You might be interested in
Consider a population list x with μx=10 and SDx = 1. A second population list, y, with μy=10 and SDy=2, is added to the first li
Basile [38]

Answer:

The combined standard deviation is 1.58114.

Step-by-step explanation:

The formula to compute the combined standard deviations of two different data sets is:

SD_{c} =\sqrt{\frac{n_{X}S^{2}_{X}+n_{2}S^{2}_{Y}+n_{X}(\mu_{X}-\mu_{c})^{2}+n_{Y}(\mu_{Y}-\mu_{c})^{2}}{n_{X}+n_{Y}}

Here \mu_{c} is the combined mean given by:

\mu_{c}=\frac{n_{X}\mu_{X}+n_{Y}\mu_{Y}}{n_{X}+n_{Y}}

It is provided that the sample size is same for both the data sets, i.e.n_{X} = n_{Y}=n

Compute the combined mean as follows:

\mu_{c}=\frac{n_{X}\mu_{X}+n_{Y}\mu_{Y}}{n_{X}+n_{Y}}\\=\frac{(n\times10)+(n\times10)}{n+n}}\\=\frac{20n}{2n}\\ =10

Compute the combined standard deviation as follows:

SD_{c} =\sqrt{\frac{n_{X}S^{2}_{X}+n_{2}S^{2}_{Y}+n_{X}(\mu_{X}-\mu_{c})^{2}+n_{Y}(\mu_{Y}-\mu_{c})^{2}}{n_{X}+n_{Y}}}\\=\sqrt{\frac{(n\times1^{2})+(n\times2^{2})+(n(10-10))+(n(10-10))}{n+n}}\\=\sqrt{\frac{n+4n}{2n} } \\=\sqrt{\frac{5n}{2n} } \\=\sqrt{\frac{5}{2}} \\=1.58114

Thus, the combined standard deviation is 1.58114.

3 0
3 years ago
Brain enjoys hang gliding on his last flight, he jumped off a cliff 520 high he landed 450 from the base of the cliff how far di
belka [17]

Answer:

Brain travelled 687.68 from the cliff.

Step-by-step explanation:

Given that:

Height of the cliff = 520

Base of the cliff = 450

The distance will form the hypotenuse of right angled triangle.

Pythagorean theorem states square of hypotenuse of right angled triangle is equal to the sum of squares of base and height of triangle.

Using pythagorean theorem;

a = 520, b=450, c = hypotenuse

a^2+b^2=c^2\\(520)^2+(450)^2=c^2\\270400+202500=c^2\\472900=c^2\\c^2=472900

Taking square root on both sides

\sqrt{c^2}=\sqrt{472900}\\c=687.68

Hence,

Brain travelled 687.68 from the cliff.

6 0
2 years ago
Find the sum of the first 21 terms of the sequence 5,9, 13, 17, 21, ...
Scorpion4ik [409]
21(5+85)/2= 21•45= 945
8 0
3 years ago
Which of the following ratios are equivalent to 20%?
boyakko [2]

Answer:

C, D

Step-by-step explanation:

1/5 is .20 which is 20%

4/20 is equal to 1/5 which is 20%

Hope this helps

5 0
3 years ago
If you travel 1000 feet in 5 minutes, what is your speed per minutes?
Papessa [141]

Answer: 200 feet

Step-by-step explanation:

1000feet/5feet= 200feet

6 0
2 years ago
Read 2 more answers
Other questions:
  • If measure angle XAB=32 What is measure angle CAX?
    11·2 answers
  • Which of the following numbers has a prime factorization of 2 x 5 x 5? <br> 50<br> 30<br> 15<br> 20
    7·2 answers
  • The string of a kite is 100 meters long and it makes an angle of 60° with the ground. What is the height of the kite?
    12·1 answer
  • What is the perimeter?<br> No links I’m reporting you if you do.
    13·1 answer
  • Don’t really get these very much. Can anyone help ?
    12·1 answer
  • Find the angle between the following pairs of lines x^2+6xy +9y^2-4x +12y-5 =0​
    9·1 answer
  • -37900 divided by -1750
    9·1 answer
  • Angel went to the store to buy some chicken. The price per pound of the chicken is $4 per pound and he has a coupon for $2.75 of
    6·2 answers
  • -9 divided by 7.2 help me plz
    9·1 answer
  • In 13 liters of 18% salty solution we add 402g of salt. What is the concentration of the new mixture?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!