Answer:2
Step-by-step explanation:
If a student receives a score of 80, how many questions did this student answer ... (5). Let x = the first number, and y = the second number ... If John only has 25 coins in his pocket, how many of the coins are quarters?
Substitute x = -5
|2* -5 -1| + 10
|-10-1| + 10
21
The square root of 400 can be positive 20 or negative 20. 20x20=400. -20x-20=400. Hope this helps! ;)