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3 years ago

I’m really confused on this problem. I nee

Mathematics

2 answers:

Marat540 [252]3 years ago

7 0

$2x + ( - 2x - 6) = 5 \\ - 6 = 5 \\$
No solution

Alinara [238K]3 years ago

7 0

Y= -2x-6
2x+y=5 so then y= -2x+5

If you look at those two equations and ask yourself when is
y = a number-6 and in the same time
y = same number +5
The answer is never, so the system of equations has no solutions

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A rug is to be centered in a room so that the border around it is of a consistent width on all four sides. If the room is 10 ft

aleksley [76]

Answer:

The width of the border can be 9 feet or 3.5 feet.

Step-by-step explanation:

Let the width be x

Length of room = 10 feet

Breadth of room = 15 feet

Length of rug = 10-2x

Breadth of rug = 15-2x

Area of rug = $(10-2x)(15-2x)$

We are given that the area of the rug is 24 square feet.

So, $(10-2x)(15-2x)=24$ ---A

$150-20x-30x+4x^2=24$

$150-24-50x+4x^2=0$

$126-50x+4x^2=0$

$2(x-9)(2x-7)=0$

$x=9,\frac{7}{2}$

$x=9,3.5$

Substitute x =9 in A

$(10-2(9))(15-2(9))=24$

$24=24$

LHS = RHS

Substitute x = 3.5

$(10-2(3.5))(15-2(3.5))=24$

$24=24$

LHS = RHS

So, The width of the border can be 9 feet or 3.5 feet.

7 0

3 years ago

Help pretty please .w.

sineoko [7]

I don’t know what that is it’s probably 9999999

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3 years ago

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Erify that f has an inverse. then use the function f and the given real number a to find (f −1)'(a). (hint: see example 1. if an

zhannawk [14.2K]

The function

... f(x) = (x+2)/(x-1) = 1 + 3/(x-1)

is symmetrical about the line y=x, hence is its own inverse.

We can evaluate the desired derivative directly.

... f'(x) -3/(x-1)²

so f'(2) is

... f'(2) = -3/(2-1)²

$(f^{-1})(2)=-3$

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3 years ago

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Neporo4naja [7]

Answer:

this is so easy

Step-by-step explanation:

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3 years ago

Which of the following options have the same value as 70% of 80?

snow_tiger [21]

56 is the answer so it's A, C and E.

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