Let x be the number of mm of pure alcohol to be added:
I will add the mm to express the volume in mm
100mm.(19%) + (100%).x mL = (100 mL+x mL).(40%).
Now right again without the %
100.(0.19) + x.(1) = (100+x).(0.4)
19 + x = = 40 + 04x
x - 0.4x = 40 - 19
0.6 x = 21
x = 21/0.6 and x = 35 mL. This te quantity of pure alcohol should to be added to get a solution at 40%.
Answer:
Answer: √49
___________
√49 = 7
Step-by-step explanation:
The area of a square is equal to the square of its side or the product of its side and its side.
A = s², because the sides of a square are congruent.
Answer:
I think you are correct
Step-by-step explanation:
Answer:
x + 4y = 20
Step-by-step explanation:
Step 1: Subtract "x" on both sides.
x + 4y = 20
<u>-x -x</u>
Step 2: Simplify --> 4y = -x +20
Step 3: Divide 4 on all sides to leave "y" by itself. 4y = -(1)x + 20
4 4 4
Step 4: Simplify: y = -1/4x + 5
Answr: The Slope is "-1/4". The slope will always be the number in front of the "x".
Answer:
f(4) = 0
Step-by-step explanation:
If the value of x is between 0 and 5, then the f(x) will equal 0.
x = 4 is greater than 0 and less than 5, so f(4) = 0