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serious [3.7K]
3 years ago
8

Solve the system of equations by using a matrix. x - 5y = -5 -4x - 2y = 20

Mathematics
1 answer:
Pepsi [2]3 years ago
4 0

Answer:

1. x = -5 + 5y

2. x = -5 - y/2

Step-by-step explanation:

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Sum of 2 numbers equals 95 .if one number exeeds by 25 find the athor number​
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PLEASE HELP I WILL GIVE BRAINLEST AND 20 POINTS PLEASEEEE
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Answer:

Question 4: Which equation is parallel to the above equation and passes through the point (35, 30)

y= \frac{5}{7} x + 5  is the correct answer, I found this by inputting the x and y value of the coordinate (35, 30) onto the equation and solving for y-intercept since the slope of all equations is the same (since it's traveling parallel)

30 = \frac{5}{7} (35) + y\\30 = 25 + y\\5 = y

so the equation would be y= \frac{5}{7} x + 5

Question 5: Which equation is perpendicular to the above equation and passes through the point (35, 30)

y=\frac{-7}{5} x+79 is the correct answer, I found this using the same method as before, input coordinate values into the equation and solve for the y-intercept (The only thing changed from the last answer is the opposite reciprocal slope).

30 = \frac{-7}{5}(35) + y \\30 = -49 + y  \\79 = y

so the equation would be y=\frac{-7}{5} x+79

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2 years ago
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