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sertanlavr [38]
3 years ago
14

Which represents the solution of the graphed system of equations, y=x^2-2x and y=-2x-1

Mathematics
1 answer:
elena55 [62]3 years ago
6 0

Answer:

x = √(-1) = i

Since the value of √(-1) is not real.

The system has no real solution.

Step-by-step explanation:

The solution to the system of equations is at the point where they intercept each other.

y1 = y2

For the given equation;

y=x^2-2x and y=-2x-1

To get the where they intercept, we will equal both equations;

y=x^2-2x = -2x-1

x^2 - 2x = -2x - 1

x^2 - 2x + 2x + 1 =0

x^2 +1 = 0

x^2 = -1

x = √(-1) = i

Since the value of √(-1) is not real.

The system has no real solution.

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Bijou has $72 in her savings account and plans to save $x each month for 8 months. The expression $8x+$72 represents the total a
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Answer:

 The total money in account after 8 months is $72 + $8 x

Step-by-step explanation:

Given as :

Total money available in saving account = $72

The money saves each month in account = $x

So, The money saves in account after 8 months = $x × 8 = $8 x

Let The total money in account after 8 months = $A

Or, A = money available in saving account +  money saves in account after 8 months

i.e A = $72 + $8 x

So, The total money in account after 8 months = A =$72 + $8 x

Hence,  The total money in account after 8 months is $72 + $8 x  Answer

4 0
3 years ago
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Anna71 [15]

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f(x)=\frac{1}{3} (4^x)

f(2)=\frac{1}{3}(4^2)

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Your answer is D

4 0
3 years ago
Read 2 more answers
The exact value of cos 13pi/8 is
Naily [24]

Answer:

answer is : Cos(13pi/8) = 0.3826  

Step-by-step explanation:

We have, Cos (13pi/8)

Since 13pi/8 can be shown as 3pi/2 < 13pi/8 < 2pi

Hence 13pi/8 lies on fourth quadrant.

In fourth quadrant cosine will be positive.

Cos (13pi/8) = cos(3pi/2 + pi/8)

applying formula cos(A+B) = cos A cosB - sinAsinB

i.e Cos(3pi/2 + pi/8) = cos(3pi/2)cos(pi/8) - sin(3pi/2)sin(pi/8)

∵ Remember cos(3pi/2) =0 , sin(3pi/2) = -1

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Hence we got Cos(13pi/8) = 0.3826                          

6 0
3 years ago
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nalin [4]

Answer:

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Step-by-step explanation:

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Area of rectangular field =

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Putting the values, we get,

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7 0
3 years ago
Write an equation of the line below.
katrin [286]
Hello!

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To find the slope just make a growth triangle. We go down twice (then to the right 6 times).
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