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tresset_1 [31]
3 years ago
10

Which ordered pair is the solution to the system of equations?

Mathematics
2 answers:
azamat3 years ago
8 0
2x+y=-8
<span>x-y=-4 
+------------
3x= -12
x= -4

x-y= -4
-4 -y= -4
y=0

This questin answer is  D(-4,0)

Hope this helps :))</span>
ira [324]3 years ago
3 0
2x+y=-8\\&#10;x-y=-4\\&#10;------\\&#10;3x=-12\\&#10;x=-4\\\\&#10;-4-y=-4\\&#10;-y=0\\&#10;y=0\\\\&#10;(-4,0) \Rightarrow D
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16x^2-16x=5 solve the equation by completing the square
Ivanshal [37]

This is your answer: x= -1/4 or x=5/4. Plze mark me brainiest:)

7 0
3 years ago
10 POINTS WILL MARK BRAINLIEST <br>Find the restriction on y=2x^2-8
borishaifa [10]
X cannot equal +2, and can't be -1. If you factor it, then you notice you get 2(x+2)(x-2). If you use either one for the x, one will be zero and the won't, and vise-versa.
7 0
3 years ago
Suppose the time a child spends waiting at for the bus as a school bus stop is exponentially distributed with mean 7 minutes. De
Gala2k [10]

Answer:

The probability that the child must wait between 6 and 9 minutes on the bus stop on a given morning is 0.148.

Step-by-step explanation:

Let the random variable <em>X</em> represent the time a child spends waiting at for the bus as a school bus stop.

The random variable <em>X</em> is exponentially distributed with mean 7 minutes.

Then the parameter of the distribution is,\lambda=\frac{1}{\mu}=\frac{1}{7}.

The probability density function of <em>X</em> is:

f_{X}(x)=\lambda\cdot e^{-\lambda x};\ x>0,\ \lambda>0

Compute the probability that the child must wait between 6 and 9 minutes on the bus stop on a given morning as follows:

P(6\leq X\leq 9)=\int\limits^{9}_{6} {\lambda\cdot e^{-\lambda x}} \, dx

                      =\int\limits^{9}_{6} {\frac{1}{7}\cdot e^{-\frac{1}{7} \cdot x}} \, dx \\\\=\frac{1}{7}\cdot \int\limits^{9}_{6} {e^{-\frac{1}{7} \cdot x}} \, dx \\\\=[-e^{-\frac{1}{7} \cdot x}]^{9}_{6}\\\\=e^{-\frac{1}{7} \cdot 6}-e^{-\frac{1}{7} \cdot 9}\\\\=0.424373-0.276453\\\\=0.14792\\\\\approx 0.148

Thus, the probability that the child must wait between 6 and 9 minutes on the bus stop on a given morning is 0.148.

6 0
3 years ago
Please help! ASAP thank you
marissa [1.9K]
First of all you have to use the formula

a^2+B^2=c^2
a=6   b=4   c=?

6^2+4^2=?
36+16=?
after you add 36 and 16 find the square root
the square root of 52 is 7.211
if you don't want it in decimals you can just put it like this <span>sqrt(52)</span>
6 0
3 years ago
URGENT what is the slope of the graph shown below
MrRissso [65]

Answer:

The answer is B

Step-by-step explanation:

You have to do the Rise/Run! ADD me as brainliest.:)

8 0
3 years ago
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