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grin007 [14]
3 years ago
5

3. Sоlvе з+2У-1 and x-2y = 13. (D)хуху​

Mathematics
1 answer:
sp2606 [1]3 years ago
3 0

Answer:

The value of x and y for the given two linear equation is x = 7 , y = - 3

Step-by-step explanation:

Given two linear equation as :

x + 2 y - 1 = 0            

Or, x + 2 y = 1               ..........A

x - 2 y = 13                    ............B

Now, Solving both equations A and B

i.e (x + 2 y) + (x - 2 y) = 1 + 13

Or, (x + x) + (2 y - 2 y) = 14

Or, 2 x + 0 = 14

Or, 2 x = 14

∴ x = \dfrac{14}{2}

i.e x = 7

Now, Put the value of x into eq A

So, 7 + 2 y = 1

Or, 2 y = 1 - 7

Or, 2 y = - 6

∴  y = \dfrac{- 6}{2}

i.e y = - 3

So, The value s of x = 7 and y = - 3

Hence, The value of x and y for the given two linear equation is x = 7 ,          y = - 3 Answer

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Suppose lines EF and GH are reflected over the line Y equals X to form the lines JK and LM which statement would be true about t
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Answer:

A) JK and LM will be parallel to each other.

Step-by-step explanation:

On reflection on y=x line the x co-ordinate changes with y co-ordinate and y co-ordinate changes with x co-ordinate

(x,y)\rightarrow (y,x)

Points on line EF

(0,6) , (-5,-2)

On reflection of this line on y=x the new points we get for line JK are

(6,0),(-2,-5)

Points on line GH

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On reflection on y=x line the new points we get for line LM are

(9,-4),(1,-9)

Slope of line JK

m=\frac{y_2-y_1}{x2-x1}\\m=\frac{(-5)-0}{(-2)-6} \\m=\frac{-5}{-8}=\frac{5}{8}

Slope of line LM

m=\frac{y_2-y_1}{x2-x1}\\m=\frac{(-9)-(-4)}{1-9} \\m=\frac{-9+4}{-8}=\frac{-5}{-8}\\m=\frac{5}{8}

For two line to be parallel, their slopes will be same.

m_{JK} =\frac{5}{8} , m_{LM}=\frac{5}{8}

Since slopes of lines JK and LM are same therefore we can say that these are parallel to each other.

5 0
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1. Using complete sentences, describe how angle relationships can be used to find the value of x In this figure. Then, find the
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2 years ago
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nirvana33 [79]

Answer:

15

Step-by-step explanation:

PERT estimate is a measuring strategy that is based on a weighted average. It is used in measuring the uncertainty and risk via three estimates to determine an estimated likelihood for a project's cost or period of completion.

The formula is (O + 4M + P) ÷ 6

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Rounded figure is equal to 15.

Hence the final answer to the question is 15

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Write 0.28 in expanded form
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