1. Work out the speed of a car travelling:
2 answers:
Step-by-step explanation:
speed is a scalar quantity (which only needs a magnitude), and velocity is a vector quantity (needs a magnitude with a direction)
Here since they want the "speed" you can use the velocity formula, but without a direction.
A. v=100/10
v=10m/s
B. v=300/20
v=15m/s
C. v=700/35
v=20m/s
D. V=1000/200
v=5m/s
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Answer:
Option C
Step-by-step explanation:
If a line passes through a point, then that point is called a solution to the line's equation. Substituting the x and y values of that solution into the equation will give a true statement. So, to find out which option is correct, we can substitute the x and y values of (-4.5, 10) into each equation and see if the result is a true statement.
Let's try this with option C. To make things easier, convert -4.5 into decimal form: . Substitute
for x and 10 for y in the equation, then solve:
10 does equal 10, so this is a true statement. Option C is the right answer.