Obtuse "angle"... is the answer.
Answer:
100 cm
Step-by-step explanation:
The formula to answer this question is base x height divided by 2. All you have to do is substitute: 10x20= 200 divided by 2 is 100.
8/10 because 8 is on the tenths place so all you have to do is put it over 10.
Answer:
Yes there is, and it is 4.99.
Step-by-step explanation:
The constant of proportionality (let's call it 
) will relate the number of books bought 
and their cost 
in the following way:
For the 12 books:
And for the 21 books:
The for the two purchases is the same, thus there is a constant of proportionality between the two purchases.
P.S: is the price per book.
