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ryzh [129]
3 years ago
8

Solve the system of equations and choose the correct ordered pair. 3x + 4y = 38 5x - 5y = -30

Mathematics
1 answer:
faust18 [17]3 years ago
3 0
3x + 4y = 38 ( equation 1) ----> ×5 5x - 5y = -30 ( equation 2) ----> ×3 When you multiply eqn 1 by 5 you get, 15x + 20y = 190 And when you multiply eqn 2 by 3, you get, 15x - 15y = -90 Then you solve both equations by subtracting eqn 2 from eqn 1 15x + 20y = 190 15x - 15y = 90 Then 15x - 15x gets cancelled and 20y - (-15y) gives 35y and 190 - (-90) gives 280. So that gives 35y = 280 y = 8 And when you replace y = 8 in any of the two equations, x = 2
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Nostrana [21]

Step-by-step explanation:

focus(p) is on the x axis= -1

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|

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3 0
2 years ago
How do I find x on the attached right triangle<br> ?
ioda

The value of x from the given triangle is 32√3/3

<h3>SOH CAH TOA identity</h3>

In order to determine the value of x, first we need to determine the hypotenuse side of the smaller triangle.

sin 60 = 8√2/H

H = 8√2/sin60

H = 8√2 * 2/√3

H = 16√2/√3
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For the value of x, we will use the expression

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Learn more on SOH CAH TOA here: brainly.com/question/20734777

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