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Lady_Fox [76]
3 years ago
15

X=2y-1 solve this equation 3x+y=11

Mathematics
1 answer:
Ugo [173]3 years ago
8 0

Step-by-step explanation:

substitute y into x

3(2y-1)+y=11

6y-3+y=11

add like terms

6y+y-3-11=0

7y-14=0

look for a common factor

7(y-2)=0

y-2=0

therefore y=0 or y=2

find x

if x=2y-1

x=2(0)-1

x=-1

if x=2y-1

x=2(2)-1

x=3

therefore (-1;0) and (3;2)

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2 years ago
Can someone please help me with this question about given two points?Please help ASAP!!! :(
KonstantinChe [14]

Answer:

<em>The order of subtraction is not important in any of the coordinates</em>

Step-by-step explanation:

Distance Between Two Points

Given two points (x1,y2) (x2,y2), the distance between them is given by the formula

d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

The difference between both coordinates is squared, then added, and finally extracted the square root.

Based on the principle that

a*a=a^2

and also

(-a)(-a)=a^2

We can notice it doesn't matter the sign of a the square of a is always positive. If we had subtracted in the opposite way, the distance would have resulted in exactly the same. In other words, the above formula is exactly the same as

d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}

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6 0
3 years ago
Given the center (h,k) = (5,0) and radius r=3, write and equation for the circle in standard form
Len [333]

Answer

B)(x-5)^{2} + y^{2} = 9


Step by step explanation

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Now plug in these values in the standard form, we get

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Therefore, the answer is B) (x-5)^{2}  + y^{2} = 9

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3 0
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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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