Answer:

Step-by-step explanation:
Given


Required
How fast is the ball seem to be moving?
This question illustrates relative velocity;
Since the ball and the train moves in the same direction, the required velocity relative to the person standing behind is:

i.e. we add both velocities


Answer:

Step-by-step explanation:
Given the equation;

Rearranging the equation, we have;

Lowest common multiple (LCM) of S and T is ST.

Cross-multiplying, we have;

Making R, the subject of formula;

7 unit to the left, means it is 7 less than -1.
-1-7 = -8
Ans: -8
Answer:
$260
Step-by-step explanation:
Turn the percentage into a decimal.
35% -> 0.35
Multiply.
400 * 0.35 = 140
Subtract.
400 - 140 = $260
Best of Luck!