Answer:
c is the answer for 12. because it is a straight line and shows there profit
Answer:
The percent values were written incorrectly in the equation.
The amount of 7% solution should be written as 1 – x, not x – 1.
Step-by-step explanation:
a and b
Answer:

Step-by-step explanation:
Based on the given conditions, formulate: 
Calculate the product or quotient: 240
get the result: 240
Answer: 240
To find this answer, we had to use the expression 80 * 3, therefore making it the answer.
Answer: X=1
Explanation: When solving an equation, the goal is to isolate the variable (X). In order to do so, you must move everything else on the same side of the equation to the other side. So, in the equation 4=3+x, 3 is on the same side of the equation as X, so you must move it to the other side. When moving a number from one side of an equation to the other, you change the operation to the opposite: “+” becomes “-“, multiplication becomes division. Since the 3 in your equation is positive (+3), when you move it to the other side, it becomes “-3”. Thus:
4-3=x
1=x or x=1
Hope that helps シ