Which of the following fractions is an improper fraction?
*2/3
*6/11
*21/25
*8/7

8/7 is an improper fraction.

Step-by-step explanation:

An improper fraction is just a fraction where the numerator (top number) is greater than the denominator (bottom number)

2<3

6<11

21<25

8>7

Hope this helps!!!

8/7

Step-by-step explanation:

8/7 is an improper fraction.

8 > 7

A fraction has to have the numerator less than the denominator, in order to be a proper fraction.

In this case, 8/7 is the only fraction with a numerator more than the denominator.

Therefore, 8/7 is an improper fraction.

he spend 5.1 minutes chatting with his friends

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4