Answer:
Answer. 105 ounces of water is needed.
Let W = the volume of water to be mixed in ounces).
Then the volume of the 30% salt solution needed is (210-W).
The balance equation for the salt mass is
0.3*(210-W) = 0.15*210.
Simplify and solve for W:
63 - 0.3W = 31.5,
63 - 31.5 = 0.3W,
0.3W = 31.5,
W = 31.5%2F0.3 = 105.
Answer. 105 ounces of water is needed.
Step-by-step explanation:
we are given in the problem the number of hours Peter has played for video games. In this case, f(x) is the number of hours of playing with x as the number of weeks of playing. In this case, the equation f(x) = 5x.
Answer:
A
Step-by-step explanation:
5.5x = 17.6
x = 3.2
Hsppy to help:)
Answer:
Answer is E.
Step-by-step explanation:
You can quickly solve this if you know the trig ratio for the special angles. 45 degrees is one of the special angles. In this case you can use the adjacent side and hypotenuse lengths to find s, so cos is the trig ratio you want.
In general:
The ratio will be the same in this question: