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makvit [3.9K]
4 years ago
9

Solve the system of equations below. x + y = 8 3x + 2y = 21

Mathematics
2 answers:
PSYCHO15rus [73]4 years ago
5 0

answer:(x,y)=(5,3)

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.plz mark as brainliest

34kurt4 years ago
4 0

Answer:

Step-by-step explanation:

x = 5 , y = 3

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Simplify. −64x6y9−−−−−−−√3 assume all variables are nonnegative.
Lerok [7]
In this item, I take it that we are to get  the cube root of the given expression, -64x6y9. First, we look into the numerical coefficient, this is the product when -4 is multiplied to itself three times as shown below.

    -64 = (-4)(-4)(-4)

Then, 
   x6 = x2 (x2) (x2)

and,
    y9 = (y3)(y3)(y3)

If we take the cube root, we consider only one item per product. Thus, the answer is,
    
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8 0
4 years ago
Read 2 more answers
How do I work out 3-9+7 divided by 3
Katena32 [7]

Answer: I believe it should be \frac{1}{3} for the final answer and here is how I would solve for this answer.

Step-by-step explanation:

  1. Subtract 3 from 9 or 3 - 9 which equals: -6.
  2. Add -6 to 7 or -6 + 7 = 1.
  3. Divide 1 by 3 and you get \frac{1}{3}.

You get \frac{1}{3} because you can't simplify the fraction into a whole number. And if you need the decimal then you get 0.33333333 or 0.3 repeating.

I hope this helped!

8 0
2 years ago
PLZ HELP!!!<br> Which graph represents the function?
SCORPION-xisa [38]

All three of those graphs are functions.  

The main thing about a function is for every input in the domain there is exactly one output.  That doesn't mean that there has to be a y for every x;  the xs with no output, no y, are not in the domain of the function.

So to be a function for every x there needs to be <em>at most one </em>y.

The test for that is called the <em>vertical line test.</em>  If you can draw a vertical line (x=constant) through two points of the graph, that graph does not represent a function.

All three of these functions pass the vertical line test.  For the first the questionable point is x=-2.  A vertical line there passes through the graph at y=0.  It doesn't pass through the graph at y=-2 -- the open circle means that interval is open, it doesn't include (-2,-2).  So a vertical line passes through at most one point on the graph at all (shown) places, therefore it's a function.

The second one is similar at x=-2. At x=0 there's an open point; the function has no value there.  x=0 is not part of the domain.  That doesn't mean this isn't a function; it passes the vertical line test, so it's a function.

The third is like the second except now at x=-2 the value's in the right branch, y=-8.  Still this passes the vertical line test, so it's a function too.

Answer: all of the above

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The edge of a cube measures 2.2 x 10^-6cm. What is the volume of the cube in cubic centimeters?
Jlenok [28]

Step-by-step explanation:

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To determine the _____________, measure the distance around the outside of a closed shape such as a square.
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the perimeter. The perimeter is the total sum of all the edges

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