"keep-change-flip" is a strategy used to dividing fractions.
always change the mix fraction to a improper fraction and you slove.
I'll do the first one and the rest is basically done the same way.

for the last fraction equation I cross multiply the 4 divided into 4 gives you 1 and the 3 divided into 21 gives you 7.
Answer:
63
Step-by-step explanation:
Total groups: 21
number of students in each group: 3
total = 21 *3 =63
Answer:Fred got 40% right.
Step-by-step explanation:
The total number of questions in the geometry test that Fred had to answer is 15.
Of the 15 questions Fred answered six of them correctly.
Therefore, the percent that Fred got on the geometry test would be
The number that he got correctly / the total number if geometry questions × 100
This becomes
6/15 × 100 = 40%
Answer:
the volume is lbw
the surface area is lb*bh*hl or 2h(l+b)
0 and 1.
A probability of 0 means that the event will not happen. For example, if the chance of being involved in a road traffic accident was 0 this would mean it would never happen. You would be perfectly safe. A probability of 1 means that the event will happen.