A number is 9 less than negative 10 what is the number

A number is 7 more than negative 16 what is the number

5 teams will play in a tournament. Each team will play every other team once. How many games will be played

1.-19

2.-9

3. 15

Step-by-step explanation:

-10-9=-19

7-16=-9

5+4+3+2+1=15

for ex: the reciprocal of 3/4 is 4/3. it is the opposite.

reciprocal definition:

a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.

i belive those are the ones that are under 90 degreese.