Answer:
Step-by-step explanation:
Answer:
270km
Step-by-step explanation:
3 hours is 180 minutes
40 minutes - 60km
180 minutes - x km
x = 180/40 * 60 = 270km (the speed is 90km/h)
When a point (x,y) rotated 180⁰ about origin, the new point will be (-x, -y).
So,
if we have (5, -1), it should become (-5, 1).
So,
answer is true.
In which what? please finish the sentence.
Let's divide the 2nd equation by 3: We get -3x - 3y = -10.
If we add this result to the 1st equation, we get 0x + 0y = 0, which has infinitelyl many solutions.
Alternatively, mult. all three terms of 3x + 3y = 10 by 3, to obtain 9x + 9y = 30.
Add this result to the 2nd equation. We get 0x + 0y = 0, which (again) is always true for all x and y values. This system does not have a unique solution.