Answer:
350 mL
Step-by-step explanation:
Let q represent the quantity (in mL) needed of the 70% solution. Then the total amount of mixture will be q+50 milliliters. The total amount of alcohol in the mixture will be ...
0.70q +0.30(50) = 0.65(50 +q)
.05q = 17.5 . . . . . . subtract (0.65q +1.50)
q = 350 . . . . . . . . . divide by 0.05
You will need 350 mL of the 70% solution.
Answer:
<h2><u><em>
4m -15</em></u></h2>
Step-by-step explanation:
simplify the expression 3(m - 5) + m
3 * (m - 5) + m =
3m - 15 + m
4m -15
The answer is D.
The full specification of Newton's First Law is (from Wikipedia)
In an inertial frame of reference, an object either remains at rest or continues to move at a constant velocity, unless acted upon by a force.
On earth we're generally in slightly a non-inertial frame, with rotation and revolution around the sun. It's also impossible to turn of gravity, so objects are being acted upon by an outside force. Typically there's also the outside force of friction, which makes things tend to stop.
Since we know that a jar of 300g of coffee cost 1.20 £, the only thing we need to do to find how much coffee you will get for 1 £ is divide the amount of coffee you can buy by the amount of money it cost. In other words divide 300 grams of coffee by 1.20£:
We can conclude that you can get a jar of 250 grams of coffee for 1£.
