136 pieces? Because 68 is half of it (50%) and 68 times 2 is 136
Answer:
Euclid fifth postulate gives information regarding parallelism of lines.Euclid's fifth postulate states If a straight which falls on two straight lines makes interior angle on the same side of it.And if sum those two interior angles is less than 180° ,then two straight will not be parallel which means they if they produced indefinitely they will surely meet on the side where some of interior angles is less than 180°.
This postulate is more complex as compared to other four postulates.It says that two parallel lines never meet.This postulate is also known as parallel postulate.
Try to follow the steps im giving you here and you will get to the answer:
<span>y = x^2-8x+12
put x=4
y= 4^2 - 8(4) +12
y= 16 - 32 +12
y = -4
</span>I hope this is what you need :)
After two hours, the first car has traveled (2 x 60) = 120 miles.
That's the gap that the second car has to close.
The second car closes the gap of 120 miles in 6-2/3 hours.
He must have exceeded the first car's speed by (120/6-2/3) mph.
6-2/3 = 20/3
120 divided by 20/3 = 120 x 3/20 = 360/20 = 18 mph
The second car exceeded the first car's speed by 18 mph,
so he had to be traveling (60 + 18) = <em>78 mph</em> to catch up.
<u>Check:</u>
In 6-2/3 hours . . .
The first car covers (60 x 20/3) = <u>400</u> miles.
The second car covers (78 x 20/3) = <u>520</u> miles.
This is the same distance as the first car PLUS the 120
that he was behind when he started out.
yay !