ANSWER: x=4/9
correct me if im wrong
Answer:
-4/9
Step-by-step explanation:
9514 1404 393
Answer:
108
Step-by-step explanation:
The circumference of a circle is given by ...
C = 2πr
The circle shown has a radius of 9 in, so the circumference is ...
C = 2π(9 in) = 18π in
__
When the circle is dilated by a factor of 6, the circumference is multiplied by 6. It becomes ...
dilated C = 6(18π in) = 108π in
The multiplier of π inches is n = 108.
Distance = velocity x time
Assume the distance moved by your friend is "d" and that the time taken for you to catch to him is "t"
you are moving with a velocity of 18 mph and your friend is moving with a velocity of 12 mph.
distance covered by your friend (d) = 12t miles ......> equation 1
If you add 3 to your rate, your distance will be the same as your friend's. This means that:
<span> d+3 = 18t miles ......> equation 2
Substitute by 1 in 2:
12t + 3 = 18t
3 = 6t
t = 0.5 hours
This means that you will catch up to your friend in half an hour.</span>
<u>Given </u><u>:</u><u>-</u><u> </u>
- A car travels at an average speed of 40 km/h for 0.5 hours.
<u>To </u><u>Find</u><u> </u><u>:</u><u>-</u><u> </u>
<u>Sol</u><u>u</u><u>tion </u><u>:</u><u>-</u><u> </u>
We know that ,
→ Distance = Speed × Time
So that ,
→ Distance = 40 km/hr × 0.5 hr
→ Distance = 40km/hr × 1/2 hr
→ Distance = 20km .
<u>Hence</u><u> the</u><u> </u><u>required</u><u> answer</u><u> is</u><u> </u><u>2</u><u>0</u><u>k</u><u>m</u><u> </u><u>.</u>
