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8_murik_8 [283]
3 years ago
6

Why is it helpful to find the mean of the data set?

Mathematics
1 answer:
HACTEHA [7]3 years ago
7 0
The mean of a set of data is the average, so when writing a conclusion or justifying a solution, instead of listing all your data you can say "the average of the data collected was _____"
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Lisa purchased a hat for $10, a purse for $20, and a book for $23. The sales tax rate was 7.2 percent. What was the total amount
Mamont248 [21]

$56.82 is the correct amount

7 0
3 years ago
Factor completely. (x^2 – 4)(x^2 + 6x + 9)<br>​
sertanlavr [38]
<h3>Answer:   (x-2)(x+2)(x+3)(x+3)</h3>

This is the same as (x-2)(x+2)(x+3)^2. The order of the factors doesn't matter.

===============================================

Explanation:

x^2-4 factors to (x-2)(x+2) after using the difference of squares rule

x^2+6x+9 factors to (x+3)(x+3) after using the perfect square trinomial factoring rule

So overall, the original expression factors to (x-2)(x+2)(x+3)(x+3)

We can condense this into (x-2)(x+2)(x+3)^2 since (x+3)(x+3) is the same as (x+3)^2

-------------------

Side notes:

  • Difference of squares rule is a^2 - b^2 = (a-b)(a+b)
  • The perfect square trinomial factoring rule is a^2+2ab+b^2 = (a+b)^2
8 0
3 years ago
5 * 3/5 i need help please
kompoz [17]

Answer:

3

Step-by-step explanation:

Order of operations.

5*3/5 is basically the same as 5 times 3 divided by 5. If you are multiplying 5 by 3, and then dividing that same number from the answer, which is 5, then you will get the same number you multiplied by, or 3.

6 0
4 years ago
The ratio of boys to girls in home room is 2:3. If there are 8 boys how many girls are there .
Serhud [2]

Answer:

12 girls

Step-by-step explanation:

multiply 8 by 3/2 to get 12.

6 0
3 years ago
Read 2 more answers
How does the value of c affect the graph of f(x) = et+c?
seraphim [82]

Answer: A

Step-by-step explanation: c shifts the graph up or down.

8 0
3 years ago
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