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Wewaii [24]
3 years ago
8

Solve the system of equations. (1 point) 5x + y = 9 3x + 2y = 4 (−2, 5) (1, 4) (2, −1) (4, −4)

Mathematics
1 answer:
allochka39001 [22]3 years ago
5 0

Heyo, the answer is (2,-1).

5x+y=9

3x+2y=4


I went ahead and multiplied the first equation by -2(so I can get rid of the y's)

-10x-2y=-18

3x+2y=4

Just simply add now

-7x=-14

Divide by -7 to get x by itself

x=2



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7.<br>(-3x³)(-2x³y⁴z)(-3z²)÷(4x³z)(-3yz) (-3xyz)​
serg [7]

Answer:

-\frac{x^2y^2}{2}

Step-by-step explanation:

We have an extremely large equation and are asked to divide it, so let's solve it step-by-step :

Remove the parenthesis to make it easier to read :

\frac{-3x^3 *2x^3y^4z *3z^2}{4x^3z*3yz*3xyz}

Multiply the numerators :

\frac{-18x^6y^4z^3}{4*3*3x^3yyzzz}

Multiply the denominators :

\frac{-18x^6y^4z^3}{36x^4y^2z^3}

Apply the negative rule :

-\frac{18x^6y^4z^3}{36x^4y^2z^3}

Cancel the common factor which is 18 :

-\frac{x^6y^4z^3}{2x^4y^2z^3}

Apply the addition exponent rule :

\frac{y^4z^3x^{6-4} }{2y^2z^3}

Subtract :

\frac{x^2y^4z^3 }{2y^2z^3}

Apply the rule for y :

\frac{x^2y^{4-2} z^3 }{2z^3}

Subtract :

\frac{x^2y^2z^3 }{2z^3}

Cancel the common factor of z^3 :

-\frac{x^2y^2}{2}

5 0
3 years ago
The price of a cup of coffee was $2.65 yesterday. today, the price fell to $2.50 . find the percentage decrease. round your answ
sergejj [24]
We must find the difference between prices. $2.65 - $2.50 = $0.15. Now we need to calculate what percent $0.15 is of $2.65. It is 5.7%! The price decreased, so it is a 5.7% decrease!
8 0
3 years ago
Please help there’s a picture <br> 60°<br> 60<br> Y=?
Zinaida [17]

Answer:

Pretty sure it's 90 degrees

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Can you answer any of these or all I really need to finish today 10 points for any all questions
Rudiy27
Number 3 would be y=4x.
Number 5 would be 9 1/24 for the left side and 133/8 for the right side.

6 0
3 years ago
Plzzz help me with this ​
NeX [460]
You would say that the side ADAC is congruent to ABCA because the two triangles where it is split in half are congruent as well.
3 0
2 years ago
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