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Vsevolod [243]
3 years ago
8

I do not understand this im lost

Mathematics
2 answers:
mote1985 [20]3 years ago
7 0
In such type of questions, all that you are supposed to do is, use basic mathematics to eliminate any one of the given two variables. Check out the equations if in case you can multiply any of the given ones with a -1 and add the two equations,eliminating one of the variables.
tester [92]3 years ago
4 0
2x-3y=9
-5x-3y=30
Multiply the first equation by negative one to cancel out the Ys
-2x+3y=-9
-5x-3y=30
Add the equations
-7x=21
X=-3 plug in X in one of the original equations

2(-3) -3y=9
-6-3y=9
-3y=15
Y=-5
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What is the sign of 3 x y 3xy3, x, y when x > 0 x>0x, is greater than, 0 and y < 0 y<0
Colt1911 [192]

Answer:

The sign is negative

Step-by-step explanation:

Given

Expression = 3xy

x > 0

y

Required

Determine the sign

The expression can be split into 3 factors

(3) (x) (y)

If x > 0 then x is positive and If y < 0 then y is negative

So, the expression becomes:

(+3) (+x) (-y)

<em />

Leave only signs

(+) (+) (-)

+ * + = -

So, we have:

(+*+) (-)

(+) (-)

+ * - = -

So, we have:

(+) (-) = -

<em>Hence, the sign of the expression is negative</em>

<em></em>

Take for instance;

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The expression would be:

3 *2 * - 4 =-24 -- negative

4 0
3 years ago
Please help!!!!!!!!!!
steposvetlana [31]

9514 1404 393

Answer:

  -203.1875

Step-by-step explanation:

The ends of the interval are ...

  (-4, g(-4)) = (-4, 1023 15/16)

  (1, g(1)) = (1, 8)

The average rate of change is the slope of the line between these two points:

  m = (y2 -y1)/(x2 -x1)

  m = (8 -(1023 15/16))/(1 -(-4)) = (-1015 15/16)/5 = -203 3/16

The average rate of change on the interval is -203 3/16.

5 0
3 years ago
2 plus 2 is for times 20 is
Damm [24]
2+2=4 x 20=80 I hope this is what you were looking for
4 0
3 years ago
Read 2 more answers
Which point on the number line represents the product
KiRa [710]

Well I would say the answer to your question is

A why?

well because -4 times -2 equals Positive 8 BUT if you times 8 by negative 1 it turns it back into a negative number!


Hope this helps

5 0
3 years ago
Read 2 more answers
99 to the power of 69
Nimfa-mama [501]
4.998370298991988e+137
Well, thats a large number. Trust me, im a "prodigy"
4 0
3 years ago
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