The legs of a right triangle are 5 and 7 cm long, respectively. what is the length of the hypotenuse? if necessary, round your answer to two decimal places.

a. 12 cm
b. 9 cm
c. 4.90 cm
d. 8.60 cm

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

Acircus act has 3 times as many elephants as acrobats. jorge noticed that all together there were 56 legs in the circus ring. how many elephants were in the show?