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Cloud [144]
2 years ago
15

Plzzzzzz help me i am timed

Mathematics
1 answer:
harkovskaia [24]2 years ago
6 0
The answers are 8.5 and 4.2
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How do I solve this out??
GuDViN [60]
<h3>Answer:</h3>

(x, y) = (7, -5)

<h3>Step-by-step explanation:</h3>

It generally works well to follow directions.

The matrix of coefficients is ...

\left[\begin{array}{cc}2&4\\-5&3\end{array}\right]

Its inverse is the transpose of the cofactor matrix, divided by the determinant. That is ...

\dfrac{1}{26}\left[\begin{array}{ccc}3&-4\\5&2\end{array}\right]

So the solution is the product of this and the vector of constants [-6, -50]. That product is ...

... x = (3·(-6) +(-4)(-50))/26 = 7

... y = (5·(-6) +2·(-50))/26 = -5

The solution using inverse matrices is ...

... (x, y) = (7, -5)

7 0
2 years ago
If the cost to the store is $20 and the selling price is $32 what is the markup?
nata0808 [166]

Answer:

60%

Step-by-step explanation:

It went up 12 dollars, and you need to find how much 12 is of 20 as a percent. You do 12/20 times 5/5 and get 60/100, so 60% markup

5 0
3 years ago
Read 2 more answers
Can someone make sure that I’m right
WARRIOR [948]

Answer:

A

Step-by-step explanation: You are correct!

5 0
2 years ago
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the distance between Columbus Ohio and New York City is about 560 miles how many hours would it take the train to travel between
arlik [135]
How fast is the train going??
7 0
3 years ago
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The middle one. Pls answer I need it for homework
natita [175]
I did that ima go fine the papers
6 0
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