Select the best possible first step to solving the system by first eliminating the x variable.
4x + 9y = 21
3x - 8y = 1

x = 5.25 + -2.25y

Step-by-step explanation:

4x + 9y = 21

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-9y' to each side of the equation.

4x + 9y + -9y = 21 + -9y

Combine like terms: 9y + -9y = 0

4x + 0 = 21 + -9y

4x = 21 + -9y

Divide each side by '4'.

x = 5.25 + -2.25y

No need to simplify. :)

  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.