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morpeh [17]
3 years ago
8

Solve 5x-y=5 and 2y-x^2=11 without using trial improvement

Mathematics
1 answer:
iren2701 [21]3 years ago
8 0

Answer:

x = 7, y = 30  and  x = 3, y = 10

Step-by-step explanation:

5x - y = 5, then y = 5x - 5

2y - x^2 = 11

2(5x - 5) - x^2 = 11

10x - 10 - x^2 = 11

-x^2 + 10x -10 = 11

-x^2 + 10x -21 = 0

x^2 - 10x + 21 = 0

(x - 7)(x - 3) = 0

x = 7, y = 30

x = 3, y = 10

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Can someone smart help me with this question plz:)
SOVA2 [1]

Answer:

K = 50

L = 90

KML = 40

LMN = 140

Step-by-step explanation:

The sum of the angles in a triangle will always be 180 degrees, and in the triangle pictured, we know the value of each angle. We can say that

5x + 4x + 9x = 180

18x = 180

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Now that we know the value of x, we can figure out the value of the angles.

K = 5x = 50

L = 9x = 90

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A straight line is 180 degrees, so to find angle KMN, you have to subtract KML (4x) from 180

180 - 4x = 180 - 40 = 140

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2 years ago
4^12*6^15*7^21<br><br> HEELPOOOOPO
Varvara68 [4.7K]

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Answer:

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Step-by-step explanation:

Taking the cube root multiplies each exponent by 1/3.

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2 years ago
Select the correct answer.<br> Which function is the inverse of ?
Artyom0805 [142]

<u>Answer:</u>

B.    f^{-1}(x) = \frac{x + 3}{9}

<u>Step-by-step explanation:</u>

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• Now make x the subject of the equation:

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Answer:

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Step-by-step explanation:

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2 years ago
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