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bearhunter [10]
3 years ago
12

10x - 4y = -4 -3x + 7y = -22 método de Cramer

Mathematics
1 answer:
-BARSIC- [3]3 years ago
6 0

(-2,-4)

Cramer's rule

10x - 4y = -4

-3x + 7y = -22

Main determinant : 58

Determinant of <em>x</em> : -116

Determinant of <em>y</em> : -232

So, (-2,-4)

Hope this helps and please consider marking branliest.

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6x = 1/2(2x + 5)<br> Solve for x step by step <br> Please answer quickly
bearhunter [10]

Answer:

x = 1/2

hope it helps

have a nice day

7 0
2 years ago
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Anyone know the answer to this?
kiruha [24]

Answer:

42

Step-by-step explanation:

Angle ABD = Angle CBD + Angle ABC

You know ABD is 70, CBD and ABC are in terms of x

70 = 5x + 13 + 3x + 33

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24 = 8x

3 = x

Replacing x in Angle ABC:

3 * 3 + 33 = 42

6 0
3 years ago
The price of a CD on sale is 0.65c, where c is the original price of the CD. What does that mean?
Nuetrik [128]
Hey there!

If the price of a CD on sale is 0.65c, then 0.35 was taken off of the original price. You can find this if you subtract 0.65 from 1, or 65% from 100%. 

Your answer would not be your second option or your fourth option, since the price you're paying is 0.65 of the original price and you are getting 0.35 of the price off. Also, your third option wouldn't be correct either, since 0.35 isn't being added on top of the total price. 

Your answer is your first option. 

Hope this helped you out! :-)
6 0
3 years ago
Which values are solutions to the inequality below? . . Check all that apply.. . x2 &gt; 49. .
Marianna [84]
   
x^2 \ \textgreater \  49 \\  \\ &#10;x_{1,2} =  \pm \sqrt{49}  = \pm 7 \\  \\ &#10;\boxed{x \in (-\infty, ~-7)\bigcup (7,~ +\infty) }



6 0
3 years ago
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Leyla drops a penny from a height of 150 m. How long will it take the penny to hit the ground? Use the formula h(t)=−4.9t^2+vt+h
torisob [31]
To determine the time it  takes for the penny to reach the ground, we use the relation of height and time given above. We do  as follows:
<span>
0 =−4.9t^2+(0)t+150
t = sqrt( 150/4.9)
t = 5.53 s

Hope this answers the question. Have a nice day.</span>
4 0
2 years ago
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