Answer:
Step-by-step explanation:
I can't do the step-by-step explanation because my device is currently dying, But I am sure that is the correct answer.
Answer:
Where is the first bag? We cant solve the question without knowing the marbles in the first bag
Let 
be the number of liters of the 10% solution to be used, and 
the number of liters of the 4% solution. The chemist wants to end up with a 4 liter solution, so
For each liter used in the mixture, a concentration of either 10% or 4% acid will be contributed, and the goal is to make a 4L solution whose concentration is 7%, which means
Solving for 
gives 
, so 2L of both solutions is needed.
Each 0 I believe is worth 10 times so 7000 is 30 times more greater.
Answer:
52.09
Step-by-step explanation:
Follow the acronym PEMDAS (Parenthesis, Exponents, Multiplication/Division, Addition/Subtraction) for order of operations problems.
1. Solve what is in parentheses. (9 - 7) = 2
48 ÷ 23 + 25 (9 - 7) = 48 ÷ 23 + 25 × 2
2. Divide. 48 ÷ 23 = 2.09
2.09 + 25 × 2
3. Multiply. 25 × 2 = 50
2.09 + 50
4. Add. 2.09 + 50 = 52.0
I know that 52.09 wasn't one of the options listed, but it is the exact answer. If you must choose one of those options, choose 50, since it is the closest.
