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3 years ago

For which equations is x = 9 a possible solution? Check all that apply

Mathematics

2 answers:

Studentka2010 [4]3 years ago

5 0

Answer:

|x| =9 yes

-|x|=9 no

-|-x|=9 no

-|-x|=-9 yes

|x|=-9 no

|-x|=9 yes

|-x|=-9 no

pogonyaev3 years ago

4 0

Answer:

A,D,F

Step-by-step explanation:

|x| = 9 –|–x| = –9 |–x| = 9

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Pre-Calc help:

stepladder [879]

Answer:

$8x^2+8y^2-79x-32y+95=0$

Step-by-step explanation:

Let the equation be : $x^2+y^2+2gx+2fy+c=0$

The point (1,1) must satisfy this equation.

$1^2+1^2+2g*1+2f*1+c=0\\2g+2f+c=-2---(1)$

Similarly, the point (1,3) must satisfy:

$1^2+3^2+2g*1+2f*3+c=0\\1+9+2g+6f+c=0\\2g+6f+c=-10---(2)$

Also for the point (9,2), we have:

$9^2+2^2+2g*9+2f*2+c=0\\81+4+18g+4f+c=0\\18g+4f+c=-85---(3)$

Solving the equations (1), (2) and (3) simultaneously, we get:

$g=-\frac{-79}{16},f=-2,c=\frac{95}{8}$

We Substitute this values to get:

$x^2+y^2+2(\frac{-79}{16})x+2(-2)y+\frac{95}{8}=0$

$x^2+y^2-(\frac{79}{8})x-4y+\frac{95}{8}=0$

Multiply through by 8 to get:

$8x^2+8y^2-79x-32y+95=0$

8 0

4 years ago

Find the average value of the function f(t)=(t-2)^2 on [0,6]

pentagon [3]

Answer:

Step-by-step explanation:

The "average value of function f(x) on interval [a, b] is given by:

f(b) - f(a)

ave. value = ---------------

b - a

Here f(t)=(t-2)^2.

Thus, f(b) = (b - 2)^2. For b = 6, we get:

f(6) = 6^2 - 4(6) + 4, or f(6) = 36 - 24 + 4 = 16

For a = 0, we get:

f(0) = (0 - 2)^2 = 4

Plugging these results into the ave. value function shown above, we get:

16 - 4

ave. value = ------------ = 12/6 = 2

6 - 0

The average value of the function f(t)=(t-2)^2 on [0,6] is 2.

4 0

4 years ago

To solve this expression, which operation should be performed last?

Vladimir79 [104]

D. Add 5 to 2 because you start with the parentheses first

6 0

3 years ago

How do u solve the system 3x+5y=8 2x-5y=-3

RSB [31]

Add both equations giving x=1
Sub back into any equation which gives you y=1

8 0

3 years ago

Maria kept a log of the number of miles she jogged each time she went for a run as she trained for an upcoming marathon. She dis

CaHeK987 [17]

Answer:

Step-by-step explanation:

Let's recall that for calculating the range of a data set, we have to find out the lowest and the highest values of the data set.

As we can see in the graph below, the lowest value in the histogram is 1 and the highest is 7.99, therefore the correct answer is:

4 0

3 years ago

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