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Sindrei [870]
3 years ago
6

I need help with 26 and 28​

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
7 0

Answer:

Step-by-step explanation:

THE DETERMINANT IS:

c=ad-bc, where we have the matrix  a  b

                                                             c   d

C=16-(-20)=16+20=36

c for 28  c=(-1/2 *8)-(-4)=-4+4=8

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The mean output of a certain type of amplifier is 102 watts with a standard deviation of 12 watts. If 63 amplifiers are sampled,
sammy [17]

Answer:

0.97547

Step-by-step explanation:

Given That:

Mean (m) = 102

Standard deviation (σ) = 12

Sample size (n) = 63

Probability that sample mean would differ from Population mean by less than 3.4 watts

P(m - s < X < m + s)

P(102 - 3.4 < Z < 102 + 3.4)

Using the Z formula :

Zscore = (x - m) / (σ/√n)

x = 102 - 3.4 = 98.6 ; x = 102 + 3.4 = 105.4

Z = (98.6 - 102) / (12/√63) = −2.248888

P(Z < - 2.2488) = 0.012263 (Z probability calculator)

Z = (105.4 - 102) / (12/√63) = 2.2488886

P(Z < 2.2488) = 0.98774 (Z probability calculator)

0.98774 - 0.012263 = 0.97547

4 0
3 years ago
Halp me :( Lots of points. will mark
frutty [35]

Answer:

y=4/5x+3

Step-by-step explanation:

7 0
3 years ago
Using side lengths only, could the triangles be similar?
o-na [289]

Answer:

the answer is no

Step-by-step explanation:

8 0
3 years ago
Assignment: Using Prime Factorization Investigation
damaskus [11]

Answer:

  1. 3(2 +7)
  2. 9(3 +5)
  3. 16(2 +3)
  4. 15(2 +5)
  5. 8(11 +3)

Step-by-step explanation:

  1. 6 + 21 = 2·3 + 3·7 = 3(2 +7)
  2. 27 + 45 = 3^3 + 3^2·5 = 9(3 +5)
  3. 32 + 48 = 2^5 + 2^4·3 = 16(2 +3)
  4. 30 + 75 = 2·3·5 + 3·5^2 = 15(2 +5)
  5. 88 + 24 = 2^3·11 +2^3·3 = 8(11 +3)

In each case, the factor outside parentheses is the greatest common factor, the product of the prime factors common to both numbers. When the same factor has different powers, the least power is the common factor.

3 0
4 years ago
Clara opened a bank account. She deposited $95 each month for 10 months. Her bank charged her 2$ each month to use the account.
ollegr [7]
The answer is C.. because if you do 95x100 you get 950 and then you need to do 2x10 and you get 20, so then you subtract 20 from 950 and you will get $930
8 0
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