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Juliette [100K]
4 years ago
12

What is 4x-3y=8 Y=-2x-1 Solving in substitution

Mathematics
1 answer:
RUDIKE [14]4 years ago
5 0
The answer is ((11/10),(-6/5))
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PLEASE HELP!
Cloud [144]
The short answer is trial and error.  The side lengths "3" and "4" can both be substituted for a² and b² but not c² because their value squared is not high enough since 5² is 25. "c²" as to match the longest side because the smaller numbers will cause the equation to not be true. See Below. 

a² + b² = c²
3² + 4² = 5²
9 + 16 =  25
25 = 25
______________________________

a² + b² = c²
4² + 3² = 5²
16 + 9 = 25
25 = 25
______________________________

a² + b² = c²
5² + 4² = 3²
25 + 16 = 9
41 ≠ 9

______________________________

a² + b² = c²
3² + 5² = 4²
9 + 25 = 16
34 ≠ 16

Hope this helped!
7 0
3 years ago
-6x - 16 &lt; 2x<br><br> help plz
VMariaS [17]

Answer:

-2 < x

Step-by-step explanation:

-6x - 16 < 2x

Add 6x to each side

-6x+6x - 16 < 2x+6x

-16 <8x

Divide by 8

-16/8 < 8x/8

-2 < x

8 0
3 years ago
Read 2 more answers
What is the value of x?
Zielflug [23.3K]
The value of x is 7cm
7 0
3 years ago
If A=5X^2+4X-6 and B=-2X^2+5X+9, then A-B equals
antiseptic1488 [7]

Answer: I promise to edit my answer, but can you please make a little more clearer to were i can understand? I am not exactly sure what "^" means...

Step-by-step explanation:

7 0
4 years ago
The area of a triangle is 14 cm2.
ipn [44]

Answer:

168 cm2

Step-by-step explanation:

b(h)/2=14

4(7)=28

24(14)=336

336/2=168

5 0
3 years ago
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