I,ll do your online work for you
I believe the answer is A! I hope that's correct! :)
Let x be the amount (the volume in milliliters) of the 5% solution to be mixed.
Then the volume of the 1% solution is 100-x milliliters.
Then your "concentration" equation is
%280.01%2A%28100-x%29+%2B+0.05%2Ax%29%2F100 = 0.02,
or, equivalently,
100-x + 5*x = 200,
which implies
4x = 100 ----> x = 100%2Fx = 25.
Answer: 25 milliliters of the 5% solution must be mised with 100-25 = 75 milliliters of the 1% solution.
380-140 is 240 and 240 divided by 2 is 120 and that's the width, 120
Answer:
D
Step-by-step explanation:
John is 10cm taller than Peter, if Peter is h than John's height would be h+10 since it is Peter's height plus ten.