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Jobisdone [24]
3 years ago
8

Only square matrices have multiplicative identities. True or false

Mathematics
1 answer:
Alex3 years ago
8 0

Answer:

true.

Step-by-step explanation:

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last month , he sold 50 chickens and 30 ducks for $550 . This month , he sold 44 chickens and 36 ducks for $532. How much does a
Kazeer [188]
Hello there, my fellow human being!
So, the chicken costs $8 and the duck costs $5, here's why.

Let's say x is the cost of a chicken while y is the cost of a duck.
We can make two linear equations using the information above.
Last month, he sold 50 chickens and 30 ducks for $550: 50x + 30y= 550
This month, he sold 44 chicken and 36 ducks for $532: 44x + 36y = 532

50x/10 + 30y/10 = 440/10
44x/4 + 36y/4 = 532/4

5x + 3y = 44
11x + 9y = 133

So, now that we have our answer simplified, we have to use elimination to solve this system of equations. But, first we need to make sure that at least one of our variables is able to be canceled out.
Let's multiply this equation by -3.
(5x + 3y = 44) * -3.

-15x-9y=-165.

11x + 9y = 133
-15x - 9y = -165
______________
-4x/4 = -32/4
x = 8
11x + 9y = 133
11(8) + 9y = 133
88 + 9y = 133
-88 -88
________________
9y/9 = 45/9
y = 5.
4 0
3 years ago
Read 2 more answers
Why isn’t there a commutative property for subtraction as well as for addition?
erma4kov [3.2K]

Answer:



Step-by-step explanation:


8 0
3 years ago
Robins are common songbirds found in many parts of the U.S. They have been observed eating berries, cherries, live worms, and sp
Alenkinab [10]

Answer:b

Omnivore and predator

Step-by-step explanation:

4 0
3 years ago
20 POINTS Determine the sample space for completing three days of chores. Use the abbreviation M for Maddie, P for Paige, and O
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ight or flight response, causing the adrenal glands to flood the body with stress hormones, such as adrenaline, and t

6 0
3 years ago
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90 x= 81 + 25 <br> I need help ?
charle [14.2K]

Answer:

x = \frac {53} {45}

Step-by-step explanation:

<u>Step 1:  Combine on the right side </u>

90x = 81 + 25

90x = 106

<u>Step 2:  Divide both sides by 90 </u>

\frac {90x} {90} = \frac {106} {90}

x = \frac {106/2} {90/2}

x = \frac {53} {45}

Answer:  x = \frac {53} {45}

4 0
3 years ago
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