A) Could be -7 + 5 and you'd represent that with 7 negative signs with 5 positive signs.
B) That's already an addition problem, and how'd you represent that is with 5 negative signs and 7 negative signs.
C) That's already an addition problem, and how'd you represent that is with 5 negative signs and 7 positive signs.
D) Could be -5 + 7, and you'd represent that with 5 negative signs and 7 positive signs.
Answer:
52 people
Step-by-step explanation:
If you place 25 square tables in a line, the 23 tables in the middle can only seat 2 people each since the other two sides are touching two other tables. The end two tables can seat 3 people since only one of their sides is touching another table.
So multiply 23 by 2 to find out how many people are sitting in the middle and then add 6 people for the two tables on the end.
23(2) + 3(2) = 52 people
So
p1 can paint hours in 10 hours, so 1/10 house per 1 hour
p2 can paint house in 6 hours so 1/6 house per 1 hour
if both start at 8:00, when finish??
find how many hours they take
1 hour=p1+p2=1/10+1/6
just add 1/10 and 1/6 and see how many to get 1/1 house done
1/10+1/6=3/30+5/30=8/30=4/15
xhours times 4/15=1
multiply both sides by 15/4 to clear fraction
xhours =15/4
xhours=3 and 3/4
they take 3 and 3/4 hours aka 3 hours and 45 mins so
8:00+3:45=11:45
they finish at 11:45 AM
C
They share the side AC
Brainliest pls!