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siniylev [52]
2 years ago
6

Use the linear combination method to solve the system of equations. â€"2. 1x 4y = 5. 3 2. 1x â€" 5. 5y = â€"0. 2 What is the sol

ution to the system? ( , ).
Mathematics
1 answer:
RoseWind [281]2 years ago
4 0

The solution to the systems of equations is (7, 3)

Given the systems of equations expressed as:

-x + 4y = 5 ....................1

x - 5y = -2 ...................... 2

Add both equations to have:

-x+x + 4y - 5y = 5 - 2

4y-5y = -3

-y = -3

y = 3

Substitute y = 3 into equation 1:

-x + 4(3) = 5

-x + 12 = 5

-x = 5 - 12

-x = -7

x = 7

Hence the solution to the systems of equations is (7, 3)

Learn more on simultaneous equations here: brainly.com/question/148035

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tia_tia [17]
The answer is  A. 23/22.

The addition rule is used to calculate the probability of one of the events from multiple pathways. If you want that only one of the events happens (there is OR in a sentence), you will use the addition rule. So, let's just add the probability that the object is green and the probability that the object is a cube.
There are in total 22 objects:
<span>7 blue cubes + 4 blue spheres + 5 green cubes + 6 green spheres = 22 objects.
</span>The probability that the object is green is 11/22 (because there are 11 objects
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The probability that the object is a cube is 12/22 (because there are 12 objects that are a cube (7 blue and 5 green) of in total 22 objects).

Thus, the probability that the object is green or a cube is:
\frac{11}{12} + \frac{12}{12} = \frac{11+12}{12} = \frac{23}{12}

8 0
3 years ago
If mX = 34° and mZ = 26°, what is mY?<br> mY = 26°<br> mY = 34°<br> mY = 60°<br> mY = 120°
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Step-by-step explanation:

5 0
4 years ago
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What is the simplified from of pi √3-8 pi√3<br>​
irina [24]

Answer:

-7pi √3

Step-by-step explanation:

Treating pi as a variable, the simplified value can be written as;

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This can be obtained from using the following simple methodology;

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6 0
3 years ago
Which shows the correct substitution of the values a, b, and c from the equation –2 = –x + x2 – 4 into the quadratic formula? Qu
sergejj [24]

Answer:

The answer in the procedure

Step-by-step explanation:

we have

2=-x+x^{2} -4

x^{2}-x-4-2=0

x^{2}-x-6=0

we know that

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0

is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

x^{2}-x-6=0

so

a=1\\b=-1\\c=-6

substitute in the formula

x=\frac{-(-1)(+/-)\sqrt{(-1)^{2}-4(1)(-6)}} {2(1)}

x=\frac{1(+/-)\sqrt{25}} {2}

x=\frac{1(+/-)5} {2}

x=\frac{1(+)5} {2}=3

x=\frac{1(-)5} {2}=-2

8 0
3 years ago
Is 2/3 an irrational number
Zanzabum
<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ No it isn't. An irrational number cannot be expressed as a fraction. An example of an irrational number is pi.

<h3><u>✽</u></h3>

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

6 0
3 years ago
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