Which value of x satisfies both 3x + y = 9 and 3x − 5y = 15? . a) \[\frac{ 10 }{ 3 }\]. b) \[\frac{ 2 }{ 3 }\]. c) \[-1\]. d) \[0\].

Option A. is the correct option.

Step-by-step explanation:

Two equations are 3x + y = 9 ------------(1)

and 3x - 5y = 15 ----------(2)

we have to calculate the value of x common for both.

We multiply equation 1 by 5 and add it to equation 2

15x + 5y = 45

3x - 5y = 15___

18x = 60

x =

Therefore option A. is the answer.

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

step by step solution :

step   1   :

1.1     4 = 22

(4)3 = (22)3 = 26

equation at the end of step   1   :

  ((23) • 26)2

step   2   :

equation at the end of step   2   :

  (23 • 26)2

step   3   :

final result :

  218

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