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Alex
3 years ago
10

Find the solution of this system of equations.

Mathematics
1 answer:
Kay [80]3 years ago
6 0

Answer:

x=y

x+12x=-26

13x=-26

x=-2

y=-2

Step-by-step explanation:

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balandron [24]

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.

6 0
3 years ago
10 points!! Pls help with 5 and 6
marissa [1.9K]

Answer:

I only know number 5 so here it is

the solution for the left is: 2x6=12

the solution for the right is: 5x3+4x1=15+4=19

and the answers are: 1.12 . 2.19

5 0
3 years ago
A family dinner check was $38.82. Estimate a 15% tip
Radda [10]

Answer:

$5.82

Step-by-step explanation:

6 0
3 years ago
7mm 13mm 4mm surface area
kogti [31]
342=2[(7*13)+(7*4)+(13*4)]
3 0
3 years ago
Two functions are shown at the top.
Rina8888 [55]

Answer:

C

Step-by-step explanation:

Rate of change is the slope

Function A:

Slope = change in y/Change in x

= (9-3)/(3-0) = 6/3 = 2

Function B:

Clearly the slope is 3

(y = mx + c, m is the slope)

Rate of change of B is more than A

4 0
3 years ago
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