Answer:
25 miles for 1 gallon
Step-by-step explanation:
Looking at the graph, for 1 gallon of gas, is about 25 miles. For 2 gallons, it is 50 miles. For 3 gallons, it is 75 miles. So based on the graph and the pattern, we can assume 1 gallon of gas will take the car 25 miles.
$5
The item is discounted by $5 per week.
x = 22.2
Let's set up this problem using cosine law:
x^2 = a^2 + b^2 -2abcos110
where a = 12, b = 15
x^2 = (12)^2 + (15)^2 - 2(12)(15)cos110
= 144 + 225 - 360(-0.342)
= 492
b = (a - 6)/V
a = Vb + 6
Subtract 6 from both sides:
a - 6 = Vb
y=3x+2
2a +2c(b-5)
substitute a=5 b=11 c=3
2(5) +2(3) (11-5)
10+6(6)
10+36
46
Choice B
