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Romashka [77]
2 years ago
5

Use substitution to determine the solution of the system of equations.

Mathematics
1 answer:
sineoko [7]2 years ago
4 0

Answer:

C

Step-by-step explanation:

Work the equations out to find your answer to each, then you see the answer

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PLEASE HELP 20 POINTS One day, River writes down the numbers $1,$ $2,$ $\dots,$ $999.$ What is the sum of all the digits that Ri
Temka [501]

Answer:

LOL this is from AOPS

Step-by-step explanation:

LOL tryna cheat out here

6 0
3 years ago
12<br>6<br>X<br>8<br>What is the length of the side x?​
JulijaS [17]
What are you looking for ? ... the area ??
7 0
3 years ago
A polynomial expression is shown below.
tester [92]
The polynomial is (mx^3+3)(2x²+5x+2)-(8x^5 +20x^4)
if it is reduced to 8x^3+6x²+15x+6, so we can find the value of m

 (mx^3+3)(2x²+5x+2)-(8x^5+20x^4) = <span>8x^3+6x²+15x+6
</span>2mx^5+5mx^4+2mx^3+6x²+15x+6-8x^5-20x^4=<span>8x^3+6x²+15x+6
</span>2mx^5+5mx^4+2mx^3=8x^3+6x²+15x+6-6x²-15x-6+ <span>8x^5+20x^4
</span>=  8x^5+20x^4+<span>8x^3= 4(2x^5+5x^4+2x^3)
finally

</span>m(2x^5+5x^4+2x^3)=<span>4(2x^5+5x^4+2x^3), and after simplification
</span>
C:  m=4

<span>4. When the expression is factored x²-3x-18 completely, 
</span>
one of its factor is x-6
<span>x²-3x-18=0
</span>D= 9-4(-18)= 81, sqrtD=9 x=3-9/2= -6/2= -3, and x=3+9 / 2= 6
so <span>x²-3x-18= (x-6)(x+6)

</span>
3 0
2 years ago
I will give you brainelist
Lelu [443]

Answer:

MP > OP

Step-by-step explanation:

5 0
3 years ago
What is the surface area of a cube whose edges are 11 inches long?
Dennis_Churaev [7]
Surface area is the total area of the surface. A cube has 6 surface, and each surface is the same. Each surface is a 11 by 11 square. Therefore there will be 6 11in. x 11in. surfaces. The math would be 11x11x6 =726.
8 0
3 years ago
Read 2 more answers
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