Please explain how to combine them into one standard form equation.

9514 1404 393

  e.  7x -y = -5

Step-by-step explanation:

Rearranging the first equation to general form, we have ...

  7x -2 = 0 . . . . subtract 5 from both sides

Rearranging the second equation to general form, we have ...

  y -7 = 0 . . . . . subtract 6 from both sides

Now, we can equate these expressions for 0:

  7x -2 = y -7

Subtracting y gives ...

  7x -y -2 = -7

and adding 2 gives the standard form equation ...

  7x -y = -5 . . . . matches choice E

Comment on the question

Mathematically, there is no good reason to do this. It seems to be simply an exercise in manipulating equations.

Here, we subtracted the y-equation from the x-equation to get the final result. There are many other ways an expression for "0" can be used to combine these equations.

idk

step-by-step explanation:

use that smart brain

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.