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Wittaler [7]
3 years ago
10

1. What is 20 1/2+ (- 34) − (7− 10 +12) simplified? Show work to support the answer.

Mathematics
1 answer:
Novay_Z [31]3 years ago
6 0

Answer:

-45/2

Step-by-step explanation:

Step by step in the screenshots!!

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Plz answer and thank you
icang [17]
A . It has a value GREATER than 8
4 0
4 years ago
Read 2 more answers
Expansion Numerically Impractical. Show that the computation of an nth-order determinant by expansion involves multiplications,
posledela

Answer:

  • number of multiplies is n!
  • n=10, 3.6 ms
  • n=15, 21.8 min
  • n=20, 77.09 yr
  • n=25, 4.9×10^8 yr

Step-by-step explanation:

Expansion of a 2×2 determinant requires 2 multiplications. Expansion of an n×n determinant multiplies each of the n elements of a row or column by its (n-1)×(n-1) cofactor determinant. Then the number of multiplies is ...

  mpy[n] = n·mp[n-1]

  mpy[2] = 2

So, ...

  mpy[n] = n! . . . n ≥ 2

__

If each multiplication takes 1 nanosecond, then a 10×10 matrix requires ...

  10! × 10^-9 s ≈ 0.0036288 s ≈ 0.004 s . . . for 10×10

Then the larger matrices take ...

  n=15, 15! × 10^-9 ≈ 1307.67 s ≈ 21.8 min

  n=20, 20! × 10^-9 ≈ 2.4329×10^9 s ≈ 77.09 years

  n=25, 25! × 10^-9 ≈ 1.55112×10^16 s ≈ 4.915×10^8 years

_____

For the shorter time periods (less than 100 years), we use 365.25 days per year.

For the longer time periods (more than 400 years), we use 365.2425 days per year.

8 0
4 years ago
HALPPPPP!!
Semmy [17]

Answer:

20,2,0,-4,-.0625

Step-by-step explanation

3*-4=-12

depending on which side its on you can multiply or divide by -4

K= -4

3 0
3 years ago
Choose all the important facts about the y-intercept. (multiple select - more than one answer is correct) The y-intercept tells
iogann1982 [59]

Answer:

Your answer should be C and D

Step-by-step explanation:

The y-intercept of the line is the value of y at the point where the line crosses the y axis.

5 0
3 years ago
3. Label the matrix according to the dimensions. *
Lelechka [254]
Add a picture please
8 0
3 years ago
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