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valentinak56 [21]
3 years ago
14

What is A−1?

Mathematics
1 answer:
leonid [27]3 years ago
5 0

Answer:

(-1/2     -1/8

  1/4    3/16)

Step-by-step explanation:

(-3  -2

 4    8 )  ^ -1

First find the determinant

-3 * 8  - (-2 *4) = -24 - (-8) = -24 +8 = -16

Multiply 1 over the determinant by The matrix with the -3 and 8 switched

and negate the -2 and the 4

1/-16(8  2

        -4    -3 )

(-1/2     -1/8

  1/4    3/16)

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A square has a perimeter of 12x + 52 units. Which expression represents the side length of the square in units?
Alex17521 [72]

Answer:

3x+13

Step-by-step explanation:

squares have 4 equal sides

12/4=3x

52/4=13

3x+13

is that 3rd option supposed to be what i put???

hope this helped

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7 0
3 years ago
1. The county fair charges $1.25 per ticket for the rides. Jermaine bought 25 tickets for the rides and spent a total of $43.75
Sloan [31]

Answer:

Y= 12.5+X

Step-by-step explanation:

Y=43.75

X=1.25x25=31.25

so 43.75 minus 31.25= 12.5

he spent 12.5 on fair addmition

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3 years ago
Estimate the amount of the tip by rounding the bill to the nearest dollar before calculating.
hram777 [196]

Answer:

36.04

The amount of the tip is approximately $

$7.00

O $7.20

0 $7.25

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Step-by-step explanation:

8 0
3 years ago
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Consider the line y=2x-4 . find the equation of the line that is parallel to this line and passes through the point , 5 4 .
RoseWind [281]
So the equation is parallel and the slope will be 2
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8 0
3 years ago
Fifteen more than 3 times a number is 33. What is the equation and solve
kati45 [8]

Answer:

x = 6

Step-by-step explanation:

15 more represents “+15”

3 times a number represents “3*x” which is written as “3x”

So fifteen more than 3 times a number is 33 would be written as;

3x + 15 = 33

Now solve for x using algebra;

3x = 33 - 15

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x = 18 / 3

<u>x = 6</u>

Hope this helps!

4 0
3 years ago
Read 2 more answers
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