C

9000009305

Level: 
C
Anne decided to make a bicycle trip with his friend which lives 10km from Anne house. Anne went from her house to the house of her friend first. Then they started to measure the time and went on a constant velocity 18km/h. In what time will be the total distance traveled by Anne equal to 34km?
1h 20min
1h 58min
2h 26min
2h 30min

9000009306

Level: 
C
Anne decided to make a bicycle trip with his friend which lives 10km from Anne house. Anne went from her house to the house of her friend first. Then they started to measure the time and went on a constant velocity 18km/h for 2h 10min. What is the total distance traveled by Anne?
49km
39km
35km
45km

9000009906

Level: 
C
Consider a function f(x)=kx with a nonzero real parameter k. Describe what happens with the function f if the coefficient k changes the sign.
The function changes the type of monotonicity on the sets R+ and R− (either from an increasing function into a decreasing function or vice versa).
The function changes its parity (from an odd function into an even function or from an even function into an odd function).
The domain of the function changes.
None of the above, both functions have the same parity, monotonicity and domain.

9000009907

Level: 
C
Consider a function f(x)=kx with a nonzero real parameter k. Suppose that the value of the coefficient k changes, but the sign of k remains the same. Describe which of the properties of f is changed.
None of the above, both functions have the same parity, monotonicity and range.
The function changes its parity (from an odd function into an even function or from en even function into an odd function).
The range of the function changes.
The function changes the type of monotonicity on the sets R+ and R− (either from an increasing function into a decreasing function or vice versa).