Answer:
C. 
Step-by-step explanation:
Replace x with a + 2 and simplify the expression.
Let x = a + 2
Answer:
D. 15/20
Step-by-step explanation: Because if it is 100 divide by 5 then it equals 20 and since 75% is 3/4 then 15/20 is your answer.
Answer:
The system will be:
x - y = 12
3x + 5y = 100
Step-by-step explanation:
Let The number of three-point questions ⇒ x
And the number of five-point questions ⇒ y
The giving a test has 12 more three-point questions than five-point questions.
So, x - y = 12
The test is worth 100 points.
So, 3x + 5y = 100
So. the system which represents this information is:
x - y = 12
3x + 5y = 100
And the solution of the system is x = 20 and y = 8
The number of three-point questions ⇒ x = 20 questions.
The number of five-point questions ⇒ y = 8 questions.
For this case we have the following definition:
d = v * t
Where,
d: distance
v: speed
t: time
Clearing the time we have:
t = d / v
Substituting values:
t = 1505/420
t = 3,583 hours
Answer:
Flight time hours:
t = 3,583 hours
