Answer:
B. x ≤ 2.
Step-by-step explanation:
56 - 10x ≥ 20 + 8x
-18x ≥ -36
x ≤ -36/-18 = 2. ( Note that the inequality sign flips because we are dividing by a negative value).
Answer:
Molly has to add 22.86 milliliters of 5% sulfuric acid.
Step-by-step explanation:
Molly has a mixture of 20 ml of 20% sulfuric acid solution.
She mixes this with 5% sulfuric acid solution and in the end she wants a 12% sulfuric acid solution.
We have to find how many milliliters of 5% sulfuric acid we have to add to make it 12% solution.
Let the volume we add be v milliliters.
We are going to equate sulfuric acid.
v = milliliters
v = 22.86 milliliters
Plugging in your numbers to the compound interest formula and assuming it is compounded yearly, you will have $15.97.
Answer:
The number is 74.
Step-by-step explanation:
15+()=42
42-15 = (x+7)/3
27(3) = x+7
81 - 7 = x
x = 74
258/300 simplified will be 43/50
As a decimal, it would be 0.86
As a percent, it would be 86%