Which of the following is equivalent to 5x - x + 3x = 30? A 8x = 30 o 7x = 30 с 3x + 5= 30 x = 30

Step-by-step explanation:

5x -x + 3x =30,  first you combine like terms 5x + 3x-x=30

8x-x =30

8-1=7

7x=30

3 cos((x - π ) - 4 = 3 cos(x) - 4 since cos(x-π) = cos(x)  

-1 ≤ cos(x) ≤ 1  

-3 ≤ 3cos(x) ≤ 3  

-3-4 ≤ 3 cos(x)-4 ≤ 3-4  

-7 ≤ 3 cos(x) ≤ -1  

The range is -7 to -1 so the midpoint is (-7-1)/2 = -4  

y = -4 is the equation of the midline

Step-by-step explanation:

there you go