Step-by-step explanation:
For all y values, just look along the y-axis. The same applies to the x-axis.
The first step would be to add 7 to both sides.
3n-7=30
add 7
3n=37
divide by 3
n=12.33
Answer:
Option A 
Step-by-step explanation:
4 infants + 11 toddlers = 15 children
4 infants / 15 children = 
H = no. of hours max has driven
g = gallons left
g = 18 - 2h
9514 1404 393
Answer:
40°
Step-by-step explanation:
The side adjacent to the angle of interest and the hypotenuse are given, so the cosine relation is relevant.
Cos = Adjacent/Hypotenuse
cos(?) = 46/60
? = arccos(46/60) ≈ 39.9445°
? ≈ 40°