Solve for y
y-21=3(x+10)

Slope = 6.000/2.000 = 3.000

 x-intercept = 51/-3 = 17/-1 = -17.00000

 y-intercept = 51/1 = 51.00000

Step-by-step explanation: "y=mx+b" is the formula of a straight line drawn on Cartesian coordinate system in which "y" is the vertical axis and "x" the horizontal axis.

In this formula :

y tells us how far up the line goes

x tells us how far along

m is the Slope or Gradient i.e. how steep the line is

b is the Y-intercept i.e. where the line crosses the Y axis

The X and Y intercepts and the Slope are called the line properties. We shall now graph the line  y-3x-51  = 0 and calculate its properties

Notice that when x = 0 the value of y is 51/1 so this line "cuts" the y axis at y=51.00000

 y-intercept = 51/1  = 51.00000

When y = 0 the value of x is 17/-1 Our line therefore "cuts" the x axis at x=-17.00000

 x-intercept = 51/-3 = 17/-1  = -17.00000

Slope is defined as the change in y divided by the change in x. We note that for x=0, the value of y is 51.000 and for x=2.000, the value of y is 57.000. So, for a change of 2.000 in x (The change in x is sometimes referred to as "RUN") we get a change of 57.000 - 51.000 = 6.000 in y. (The change in y is sometimes referred to as "RISE" and the Slope is m = RISE / RUN)

   Slope     =  6.000/2.000 =  3.000  

Slope = 6.000/2.000 = 3.000

 x-intercept = 51/-3 = 17/-1 = -17.00000

 y-intercept = 51/1 = 51.00000

m∠a is 90°

m∠b is 40°

answer: 1inch=7days  

12inch=12*7=84days

step-by-step explanation: