Answer:
Step-by-step explanation:
Lets factor the trinomial 
step-by-step:
Step 1. Since all the terms are negative, we can factor -1 out
Step 2. Split the middle term of 
, so 
Step 3. Group common terms
Step 4. Factor each parentheses
Step 5. Factor the common binomial
Now, we can put it all together:
Answer:
8.46 gallons needed to be replaced
Step-by-step explanation:
Let x be the alcohol amount that replaced
-Original has concentration of 15% multiply by the amount of 10 ,which is equal to (0.15×10).
-Removed has concentration of 15% multiply by the amount of x ,which is equal to (0.15 × X).
-Added has concentration of 80% multiply by the amount of X ,which is equal to (0.8× X).
-Solution has concentration of 70% multiply by the amount of 10 ,which is equal to (0.70×10).
So that, the equation will be:
Solution=Original + added - removed
7=1.5+0.8x-0.15x
7-1.5=0.65x
0.65x=55
x=55/0.65
x=8.46
8.46 gallons needed to be replaced.
The answer is 60.
You must first solve what is in parentheses.
3 (20)
60
Answer:
Step-by-step explanation:
first lets meake the minutes into hours by dividing our minutes into hours
6300 / 60 = 105
so in total they go 105 hours in 15 days (5 days for 3 weeks is 15 days)
to find how many hours in each day lets divide our hours into the 5 days
105 / 15 = 7 hours a day
hope this helps <3
Two say to the sixth power is 420 which equals 12 which would take 420÷12 which is 2002 10 200 to 6 power is 420÷64 = 36
