Answer:
20
Step-by-step explanation:
Start with the simplest equation of a straight line: y = mx + b.
Subst. 1 for m, 2 for x and 4 for y. Then, 4 = 1(2) + b, or b = 2.
In slope-intercept form, the equation of this line is y = x + 2.
Number 3 is .4 i think just minus 1.2 - .8
Answer:
9
Step-by-step explanation:
multiply both sides by 15 to get:
45/5 = x
9 = x