Substitute 2x as y:
3x + y = 5
3x + 2x = 5
5x = 5
x = 1
Now, substitue 1 as x into one of the two equations:
y = 2x
y = 2(1)
y = 2
Hope this helps!
(-2)(-2)(-2) is the proper expanded form for this exponential notation. Hope this helps! :)<span />
Answer:
Step-by-step explanation:
Dentist's Office = 5/6 of an hour. An hours is 60 minutes
therefore he spent 5/6 x 60 = 50 minutes at the Dentist
1/10 of those 50 minutes were spent in the waiting room that is 1/10 x 50 = 5 minutes
Therefore Sam Spent 45 minutes at the Dentist office
I think the second part of your question is missing
80% means 0.80 .
"of" in math almost always means "times".
"80% of 400" means (0.80 x 400). That's 320 .
