The speed of the airplane is the ratio of the distance to the time
The initial average speed of the airplane is approximately 110.8 mph
Reason:
Given parameters are;
The distance between Portland Oregon and Seattle Washington = 145 miles
The decrease in travel time when the speed is increase by 20 mph = minutes
The initial speed of the airplane, v = Required;
Solution;


Therefore;

Which gives;

Therefore
0.2·v² + 4·v - 2,900 = 0
v ≈ ±110.8 mph
The initial average speed of the airplane, v≈ ± 110.8 mph
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Answer:
tooth A
Step-by-step explanation:
0.23 = 0.230
0.230 > 0.195
Answer:

Step-by-step explanation:
The equation in vertex form is

Substituting in the coordinates (1,2) to find a,

Density = kg/m3 or g/cm3
hence,
4500 ÷ 0.5 = answer.
Ratio of girls to boys - 2 : 3 (2+3=5)
Total: 623 students.
623 divided by 5 equals 125.
125 times 2 equals 250.
So, 250 girls are enrolled at Lincoln Middle School.