Question

am i correct??

x + y = 0
x - y = 8

What is the solution of the system shown?


(-8, 12)
(8, -12) <-- i chose this!
(8, 12)

Answer 1

ya

Answer 2

8-(-12) is 8 +12 which would be 20, so x - y = 8 doesn't work (so no)

Answer 3

sorry! the question got cut off
1/2x+1/3y=0
1/4x-1/2y=8

Answer 4

ya

Answer 5

@baby1234567 could you help me with this question too??

Going against the current, a boat takes 6 hours to make a 120-mile trip. When the boat travels with the current on the return trip, it takes 5 hours.

What is the rate of the boat in still water?


2 mph
20 mph
22 mph <--- i think its this one... but im not sure ):

Answer 6

120/6, so 20mph

Answer 7

i chose 20mph and it was incorrect...

Answer 8

ya that's right

Answer 9

oh crap, 22 was right, I thought it said it took 6 hours to make a 120 while in still. Sorry :/

Answer 10

@theloaad oh its fine! thank you still for trying to help me (:
@baby1234567 sorry to keep asking but could you check if my answer for this question is correct?!

A 20% acid solution is mixed with a 70% acid solution to get 50 liters of a 40% solution.

Which of the following expressions is equal to 4(50)?


0.2x + 0.7y
2x + 7y <--- chose thisss
x + y

Answer 11

ya your right

Answer 12

@baby1234567 omg thank you a billionnnn you just saved me :D

Answer 13

your welcome lol