The way I know is if the last 3 digits are divisible by 8, then the number is divisible by 8.
To solve this kind of problem, there are two concepts: the total amount of solution and the total amount of acid
in this case, suppose there are x grams of the 25% solution, y grams of the 70% of soltuion
x + y = 100 => y= 100-x
0.25x + 0.7y =0.6 *100 =60
replace y with 100-x: 0.25x + 0.7(100-x)=60
0.45x=10
x= 22.22
100-22.22=77.78
so he needs to drain about 77.78 grams of the solution.
If you can write this out, it will read
(4/5)x-2>(3/10) times 2x
Now, lets combine what we can, and then add 2 to both sides,
((4/5)x>(3/5)x+2
Now divide both sides by (4/5), or multiply both sides by (5/4).
x>12x+(2 times (5/4))
Answer:
AC = 10 cm
Step-by-step explanation:
We are givne with a triangle ABC is an equilateral triangle with side AB, BC, and AC. We are given that side BC is equal to 10 cm . We are required to find the measurement of side AC.
The basic property of any equilateral triangle is that all the sides are equal. Hence
AB = BC = CA
BC=10 cm
Hence, AB = 10 cm and also AC=10 cm
this picture will explain you
the answer is 10
