Answer:
If n is a positive integer that is greater than
x and a
is a real number or a factor, then
a x n = n √ a x . a x n = n √ a x
First of all we group our m's together.
So first add
5m + 4m = 9m
Now lets set up our equation again
9m = 72 .... divide both sides by 9 to get m alone
÷9 = ÷9
************ now m is alone on the left side and we solve on the right side.
m = 8
So your answer is
m = 8
7/8 first week
3/2 second week = 12/8 total
12/8 - 7/8 = 5/8 second week
7/8 first, 5/8 second, therefor 3/8 for the third week.
3/2 + 3/8 = total in third week
12/8 + 3/8 = 15/8 = 1 7/8 total in third week
A scientist needs 60 liters of a 60% acid solution. He currently has a 40% solution and a 70% solution. How many liters of each does he need to make the needed 60 liters of 60% acid solution?
----------------
Equation:
acid + acid = acid
----------------------
0.40x + 0.70(60-x) = 0.60*60
-----
40x + 70*60 - 70x = 60*60
-----
-30x = -10*60
x = 20 liters
----
Gabe needs 20 liters of the 40% solution.
He also needs 40 liters of the 70% solution.
Answer:
12
Step-by-step explanation:
(x-h)^2 + (y-k)^2 = r^2 so taking the square root of 144 gives you 12
