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
Lunna [17]
2 years ago
10

In a test, the 10 students in group 1 get a mean score of 43%.

Mathematics
1 answer:
blagie [28]2 years ago
7 0
The mistake is that he forgot that the groups were not equal! one group was bigger than another, but he treated them as if they were equal

the real mean is calculated like this:

(43*10+15*57)/25=

(1285)/25=51.4


the real mean was 51.4



You might be interested in
A machine in a shoe factory produces shoelaces. The number of shoelaces it produces is proportional to the time. It can produce
larisa86 [58]

Answer:

12 * 3x

Step-by-step explanation:

x is equal to the minutes

7 0
2 years ago
What is a constant?​
lakkis [162]

Answer:

In Algebra, a constant is a number on its own, or sometimes a letter such as a, b or c to stand for a fixed number. Example: in "x + 5 = 9", 5 and 9 are constants.

Step-by-step explanation:

In mathematics, a constant term is a term in an algebraic expression that has a value that is constant or cannot change, because it does not contain any modifiable variables. For example, in the quadratic polynomial. the 3 is a constant term.

5 0
2 years ago
Which set of ordered pairs represents a function?
Pani-rosa [81]
Take a picture instead
5 0
3 years ago
If u don’t see it let me know I will put down the answer choices
melamori03 [73]
Tyler used the Distributive Property
5 0
3 years ago
Read 2 more answers
5x - 7y - 5x +6 +3y<br> Pls step by step. Or just answer!
Vladimir [108]
The correct answer is-4y+6
8 0
2 years ago
Other questions:
  • How do I figure 2/7 X 15 =
    9·2 answers
  • Which of the following demonstrates the commutative property across multiplication for 2 × 10 × 7        A. 2 + 10 × 7   B. 2 ×
    8·2 answers
  • Sumiko and Chung are shopping. Chung wants to buy a video game that costs $60, and Sumiko wants to buy a new pair of sunglasses
    5·1 answer
  • I forgot how to do smh. please help
    6·1 answer
  • I don't understand help​
    6·2 answers
  • I need help with this, please and thank you
    9·1 answer
  • Question in picture solve
    13·2 answers
  • Simplify -|-7+4|<br> O -3<br> O 3<br> O 11
    11·2 answers
  • What is the value of x? ​
    9·1 answer
  • I need help with problems solving 2 and problem solving 3 please
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!