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Karo-lina-s [1.5K]
3 years ago
13

2x + y = -2

Mathematics
2 answers:
andre [41]3 years ago
5 0
2x + y = -2 subtract it from
x + y = 5

You get x = -7.

Artyom0805 [142]3 years ago
4 0

Answer:

The answer to da question is 3

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A right triangle has one angle that measures 60°. What is the measure of the other acute angle?
Inessa [10]

Answer:

30 degrees

Step-by-step explanation:

90 + 60 + x = 180

150 + x = 180

-150 -150

x = 30

5 0
3 years ago
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What is the simplified form of the following expression 7(3sqrt 2x) - 3(3sqrt 16x) - 3(3sqrt 8x)
zimovet [89]

Answer:   \bold{3\sqrt{2x}-36\sqrt x}

<u>Step-by-step explanation:</u>

7(3\sqrt{2x})-3(3\sqrt{16x})-3(3\sqrt{8x})\\\\=21\sqrt{2x}-9\sqrt{16x}-9\sqrt{8x}\\\\=21\sqrt{2x}-9\cdot 4\sqrt x-9\cdot 2\sqrt{2x}\\\\=21\sqrt{2x}-36\sqrt x-18\sqrt{2x}\\\\=(21-18)\sqrt{2x}-36\sqrt x\\\\=3\sqrt{2x}-36\sqrt x

6 0
3 years ago
If someone is 54 inches tall how tall are they in meters
tigry1 [53]

Answer:

54 inches = 1.3716 meters

Step-by-step explanation:


8 0
3 years ago
What represents the inequality |x + 1| + 2 &lt; –1.
alex41 [277]
Question is a bit vague.  If you wish to graph this inequality, you'll need to know what the graph of the absolute value function y = |x| looks like; it's a " V " with the vertex at the origin.  The slope of the right half of the graph is m=1.  Draw this function.  

Next, subtract 2 from both sides.  We'll get <span> |x + 1|  < –1 - 2
or 
</span> |x + 1|  < –3.  We can stop here!  Why!  because the absolute value function is never smaller than zero, and so <span> |x + 1| is never smaller than -3.  

You could, of course, graph y = |x+1|; start with your graph for y = |x| and then move the whole graph 1 unit to the left (away from the origin).  If you do this properly you'll see that the entire graph is above the x-axis, except for the vertex (-1,0).  Again, that tells us that the given inequality has no solution.


</span>
4 0
3 years ago
what is the probability of seeing a sample mean for 21 observations less or equal to the sample mean that we observed
kramer

Answer:

P(x \le 21) = 0.69146

Step-by-step explanation:

The missing parameters are:

n = 64 --- population

\mu = 20 --- population mean

\sigma = 16 -- population standard deviation

Required

P(x \le 21)

First, calculate the sample standard deviation

\sigma_x = \frac{\sigma}{\sqrt n}

\sigma_x = \frac{16}{\sqrt {64}}

\sigma_x = \frac{16}{8}

\sigma_x = 2

Next, calculate the sample mean \bar_x

\bar x = \mu

So:

\bar x = 20

So, we have:

\sigma_x = 2

\bar x = 20

x = 21

Calculate the z score

x = \frac{x - \mu}{\sigma}

x = \frac{21 - 20}{2}

x = \frac{1}{2}

x = 0.50

So, we have:

P(x \le 21) = P(z \le 0.50)

From the z table

P(z \le 0.50) = 0.69146

So:

P(x \le 21) = 0.69146

4 0
3 years ago
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