Answer:
x= -7 y=9
Step-by-step explanation:
3x +9y= 60 [1]
-3x +y=30 [2] rewrite this as the following: y=30+3x
With equation [2] you substitute it into equation [1]
so it will now be: 3x+ 9(30 +3x) =60
3x+270 +27x=60
Group the like terms
3x+27x=60-270
30x=-210
x=-7
Use this answer into the same equation
So: 3(-7)+9y=60
-21 +9y=60
9y=60+21
9y=81
y=9
Answer:
8a
Step-by-step explanation:
group all similar terms
3a + 5a = 8a
Answer:
h = 196/65
Step-by-step explanation:
65 miles /1 hour is the moving rate
200 miles is the distance to the railroad maker
h = ?
200- 4 miles = 196 miles were left behind the train
65miles /1 hour , 130miles/2hours , ..196miles/ ?hours
h = 196/65 = 3 hours and 1/65 minutes from an hour = 3 hours and 12/13 min.
60/ 65 = 12/13
Answer:
this should help
Step-by-step explanation:
percent=5%
decimal=.05
fraction=1/20
