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denis-greek [22]
3 years ago
8

Help with these questions

Mathematics
1 answer:
balandron [24]3 years ago
6 0

9514 1404 393

Answer:

  16) No

  17)  (c)

Step-by-step explanation:

For a lot of multiple-choice matrix problems, a simple test is all that is needed to determine the correct answer.

16) The determinant of A is (-2)(-2) -(2)(-3) = 10. So, we expect to see values in the inverse matrix that are 0.2 and 0.3. Alas, they're not there. The matrices are not inverses.

  A^-1 = [[-.2, .3][-.2, -.2]]

__

17) The matrices are both 3×3, so their product is possible (eliminates choice D). The upper left term is different among the answer choices, so we can determine the correct one by computing that term only.

  BA=C

  c11 = (5)(1) +(7)(5) +(3)(-1) = 5 +35 -3 = 37

This matches the third choice (C).

If you use a calculator to compute the full matrix product, it matches choice C in all details.

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How do I solve 15=3p/6 ?
valina [46]
Given : 15 = 3p/6

=> 15 x 6 = 3p

=> 90 = 3p

=> p =90/3

=> p = 30

Hope this helps you :)
7 0
3 years ago
Read 2 more answers
La un concurs, se acordă 10 puncte pentru o problema rezolvată corect si se scad 2 puncte
mylen [45]

Answer:

2 wrongly solutions and 18 right solutions

Step-by-step explanation:

The computation is shown below:

= 20 (problems) × 10 (points)

= 200 points

And it received 176 points

So the difference is of

= 200 - 176

= 24

In the case of wrong solution, the points that are lost is

=  10 + 2

= 12

Now the solutions done wrongly is

= 24 ÷ 12

= 2

And, the solutions does rightly is

= 20 - 2

= 18

6 0
3 years ago
Can someone tell me the line of best fit and slope of this? I need the equation.
liq [111]
You just need to make a line with the most dots that you can. Make the most dots you can fit on one line from the 0 to the end of the graph diagonally and fit as many points as you can. <span />
3 0
3 years ago
A driver education course
Kobotan [32]

Answer:

  1. after 4.5 months (or 5)
  2. $795

Step-by-step explanation:

10% of $100 per month is $10 per month.

1. By saving $10 per month on insurance cost, Dan's savings after 4.5 months will be equal to the $45 cost of his course. (If billing is monthly, he won't experience any net gain from the course until the 5th insurance payment--after 5 months.)

__

2. In 7 years, the savings on insurance costs will total ...

  (7 years)×(12 months/year)×($10 /month) = $840

His cost for the course is $45, so his net saving is ...

  $840 -45 = $795 . . . net saving by age 25

8 0
3 years ago
In 9,876,543,210,000 what is the place value of the digit 6
Airida [17]

Answer:

In the billions.

Step-by-step explanation:

000 is hundreds

210 is thousands

543 is millions

876 is billions

9 is trillions

3 0
2 years ago
Read 2 more answers
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