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dem82 [27]
3 years ago
11

Solve the following system of equations by elimination. What is the value of y?

Mathematics
1 answer:
lbvjy [14]3 years ago
5 0

Answer:

y = 3

Step-by-step explanation:

2x - 5y = 1  ----------------(i)

-3x + 2y = -18 ---------------(ii)

(i) * 3               6x - 15y = 3

(ii)*2             <u> -6x + 4y = -36</u>

add==>                  -11y = -33

                                  y = -33/-11

                                  y = 3

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Answer:

x = 3,-5 is correct.

Step-by-step explanation:

The Zero Product Property:

The Zero Product Property simply tells that if a*b=0, it implies that either a=0 or b=0 (or the both of them must be equal to zero). The product of the factors is zero if and only if the one or more of  factors is zero. This is particularly useful for solving the quadratic equations .

In the given question the quadratic equation is (x-3)(x+5)=0

from the Zero Product Property, it is clear that  x-3 =0 or x =3

                 x+5 =0 or x=-5

Therefor x = 3,-5 Hence option 3 is correct.

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Step-by-step explanation:

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