What does negative x minus x minus 3x minus 4x equals to?

-x - x - 3x - 4x

Let's start from left to right. First do -x - x, which is -2x.

-2x - 3x - 4x

Now do -2x - 3x, which is -5x.

-5x - 4x = -9x

-9x is your answer.

y = -2/21(x)+5

Step-by-step explanation:

We know that the formula to find the slope of an a line y = mx + b where m is the slope and b is the y-intercept.

The formula of slope is m = (y2-y1)/(x2-x1)

Using the two points given, we can find the slope:

m = (7-5)/(-21-0)

m = -2/21

b = 5 because (0,5) is the y-intercept

y = -2/21(x)+5