Answer:

Step-by-step explanation:
slope-intercept form:

Start with the given equation, and to find the slope, convert it to slope-intercept form by solving for y.

In this case, all you need to do is subtract 3x from both sides.

Here, the slope is -3. The slope of a parallel line will also be -3.
Now, we have 3 known variables. We have the slope and the x and y of a known point. Use those 3 knowns to solve for the 1 unknown, the y-intercept.

Finally, with the slope and the y-intercept, you can write the equation of the line:

Answer:
58
Step-by-step explanation:
You just have to replace the value of n with 4.
C(n) = 46 + 3n
C(4) = 46 + 3(4)
= 46 + 12
= 58
Answer:
22
Step-by-step explanation:
90*x = 70
x = 7/9
x = 78%
100-78 = 22