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frutty [35]
1 year ago
9

Pls help answer this before 8pm

Mathematics
1 answer:
attashe74 [19]1 year ago
3 0

Answer:

Step-by-step explanation:

16 + 12 + 5 + 3 = 36

16 prefer email, 36 total students surveyed

16:36 / 4 = 4:9

4 out of 9 students prefer email

4:9 x 680 = 302.222

302 students can be expected to prefer email.

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54 is 90% of what number?
Zarrin [17]

The answer is 60 surprisingly

7 0
3 years ago
In a set of 25 aluminum castings, four castings are defective (D), and the remaining twenty-one are good (G). A quality control
lianna [129]

Answer:

The sample space for selecting the group to test contains <u>2,300</u> elementary events.

Step-by-step explanation:

There are a total of <em>N</em> = 25 aluminum castings.

Of these 25 aluminum castings, <em>n</em>₁ = 4 castings are defective (D) and <em>n</em>₂ = 21 are good (G).

It is provided that a quality control inspector randomly selects three of the twenty-five castings without replacement to test.

In mathematics, the procedure to select k items from n distinct items, without replacement, is known as combinations.

The formula to compute the combinations of k items from n is given by the formula:

{n\choose k}=\frac{n!}{k!(n-k)!}

Compute the number of samples that are possible as follows:

{25\choose 3}=\frac{25!}{3!\times (25-3)!}

      =\frac{25\times 24\times 23\times 22!}{3!\times 22!}\\\\=\frac{25\times 24\times 23}{3\times 2\times 1}\\\\=2300

The sample space for selecting the group to test contains <u>2,300</u> elementary events.

6 0
3 years ago
Graph the solution of the inequality on a number line. x − (5 − 3x) ≤ 2x − 1
egoroff_w [7]

Answer:

  • x ≤  2

Step-by-step explanation:

  • x − (5 − 3x) ≤ 2x − 1
  • x - 5 + 3x  ≤  2x - 1
  • 4x - 5 ≤  2x - 1
  • 4x - 2x ≤  5 - 1
  • 2x ≤  4
  • x ≤  2 or x ∈ (- oo, 2]

The graph includes all point to the left from point 2, same point included

4 0
3 years ago
Read 2 more answers
Mai bought a tv for 330.00 the tax rate is 8% what is the total amount paid for the tv
xxTIMURxx [149]

Mai bought a TV for $mai bought a tv for 330.00

the tax rate is 8%

330.00 x 0.08 = 26.40

what is the total amount paid for the tv

330.00 + 26.40 = 356.40

7 0
3 years ago
4. What are the next three numbers in this pattern? 7,4, 1, -2
Aleksandr [31]

Answer:

-5, -8, -11

Step-by-step explanation:

Common difference:

d = 4 - 7 \\ d =  - 3

8 0
3 years ago
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