The answer is B. If the price is marked up 25%, the selling price will be $50.
You need to multiple 7 and 5 or you could just skip the answer
The first equation is 
(Equation 1)
The second equation is
(Equation 2)
Putting the value of x from equation 1 in equation 2.
we get,


by simplifying the given equation,


Using discriminant formula,


Now the formula for solution 'x' of quadratic equation is given by:


Hence, these are the required solutions.
Answer:
or 0.375
Step-by-step explanation:
Answer:
7:2
7/2
Step-by-step explanation:
7:2 is also equivalent to 7/2