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jekas [21]
2 years ago
12

Solve the system of equations -x+y=15−x+y=15 and -5x-3y=27−5x−3y=27 by combining the equations

Mathematics
1 answer:
Genrish500 [490]2 years ago
8 0

Answer:

<em>Solution: x= -36, y=51</em>

Step-by-step explanation:

Solve the system:

  x +   y = 15

-5x - 3y = 27

By using the reduction method.

Multiply the first equation by 3:

 3x + 3y = 45

Add it to the second equation:

3x - 5x = 45 + 27

Simplifying:

-2x = 72

Dividing by -2:

x = 72/(-2)

x = -36

From the first equation:

-36 + y = 15

Adding 36:

y = 15 + 36 = 51

y = 51

Solution: x= -36, y=51

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2 years ago
The Siberian tiger can grow up to 10 4/5 feet long. Express this length as decimal
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3 years ago
Which of the following graphs could be the graph of the function f(x)=-0.08x(x^2-11x+18)?
MariettaO [177]

Answer:

option C

Step-by-step explanation:

f(x)=-0.08x(x^2-11x+18)

Factor the parenthesis and find out the x intercepts

(x^2-11x+18)

We find out two factors whose product is 18 and sum is -11

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-9  -2 gives us sum -11

(x^2-11x+18) =(x-9)(x-2)

f(x)=-0.08x(x^2-11x+18)

f(x)= -0.08x(x-9)(x-2)

set f(x) =0  and solve for x

-0.08x(x-9)(x-2) =0

-0.08x =0, so x=0

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option C is correct

The graph is attached below4


5 0
3 years ago
Read 2 more answers
Determine the values of a, b, and c for the quadratic equation<br><br> 3x2−5x+6=0
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Answer:

The values of a, b, and c for the quadratic equation

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7 0
3 years ago
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Sindrei [870]

Answer:

d) 4 + 7 - 2

Step-by-step explanation:

7 + 2 - 4 = 5

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7 - 4 + 2 = 5

4 + 7 - 2 = 9

5 0
2 years ago
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