Answer:
$180
Step-by-step explanation:
Since the cost of the telescope with the 30% discount is $126 then $126 is 70% of the original price. Remember 100-30=70. To find the original price set up a proportion with these values:
Solve for the original price by cross multiplying numerator with denominator.
x(70) = 126(100)
70x = 12600
x= $180
Since this can't happen, let's suppose that P=150, then:
Now we have to move the 100 to the other side of the equation with a negative sign to get this:
Finally, to get w, we move the 2 that's multiplying to the other side dividing the 50:
Therefore, the width of the rectangle would be 25 ft if the perimeter is 150ft, and we can see how the rectangle would look:
