What is the solution of the system? Use elimination. 5x + 4y = –2 x – 4y = 14

The answer to your question is x = 2, y = -3

Step-by-step explanation:

Data

                   5x + 4y = -2                Equation l

                     x - 4y = 14                 Equation ll

Process

-Sum up the equation

Result

                        6x = 12

Solve for x          x = 12/6

                           x = 2

-Substitute x in equation ll

                     2 - 4y = 14

-Solve for y

                        -4y = 14 - 2

                       -4y = 12

                           y = 12/-4

-Result

                            y = -3                    

none of the option is correct.

step-by-step explanation:

it says to find which expression equals 9^3 sqrt 10 = ?

9^3 sqrt 10 = 729 sqrt 10.

checking option a. 5 sqrt 10 + 4 sqrt 10

5 sqrt 10 + 4 sqrt 10

= 9 sqrt 10.

checking option b. 5^3 sqrt 10 + 4^3 sqrt 10

5^3 sqrt 10 + 4^3 sqrt 10

= 125 sqrt 10 + 64 sqrt 10

= 189 sqrt 10.

checking option c. 5 sqrt 10 + 4^3 sqrt 10

5 sqrt 10 + 4^3 sqrt 10

= 5 sqrt 10 + 64 sqrt 10

= 69 sqrt 10.

checking option d. 5^3 sqrt 10 + 4 sqrt 10

5^3 sqrt 10 + 4 sqrt 10

= 125 sqrt 10 + 4 sqrt 10

= 129 sqrt 10.

hence, none of the option is correct.

answer: a and b

step-by-step explanation: