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inysia [295]
3 years ago
11

What solution does this equation have: -2x+5y=10 and -4x+10y=20? A.) the only solution is (5,4) B.) there are infinitely many so

lutions C.) the only solution is (10,6) D.) there are no solutions
Mathematics
1 answer:
Lunna [17]3 years ago
7 0

Answer:

  B.) there are infinitely many solutions

Step-by-step explanation:

The second equation is twice the first. They are "dependent" equations, both describing the same line. Every point on that line is a solution to both equations. So, there are infinitely many solutions.

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Answer:4) 1.  (3^4)^3=3^12    ,

                  2.(-10^3)^6=-10^18  others are similar...

              5) 1.  (2^7/2^5)=2^2,4  ,

                  2.(a^7/a^3)=a^4   ,

                  7.  [(-4)^3 x (-4)^5)]/[ (-4)^2 x(-4)^3]=4^3   others are similar...

Step-by-step explanation: 4)1. step1. 3^(4x3) ,  2. step1. -10^(3x6)

                                                    step2. 3^12      ,     step2. -10^18

                                              5)1. step1. 2^(7-5)  ,  2. step1. a^(7-3)

                                                     step2. 2^(2)     ,      step2. a^(4)

                                                 7. step1. -4^(3+5)/-4^(2+3)

                                                     step2. -4^(8)/-4^(5)

                                                     step3. 4^(8-5)

                                                     step4. 4^(3)

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