Answer:
365
Step-by-step explanation:
The discount is 30 %
That means we pay 70 %
original price * 70% = 255.50
Change to decimal form
original price * .70 = 255.50
divide each side by .70
original price * .70/.70 = 255.50/.70
original price =365
Answer:1
1. 
2. ∠ABC = 120°, ∠BCD = 90°, ∠CDA = 60°, ∠DAB = 90°
Step-by-step explanation:
It's important to note here that the measure of all interior angles in a quadrilateral will add up to 360°
We know this using the formula
, a 4 sided figures angles will add up to

This means that all of the angles (4x, 3x, 2x, 3x) will add up to 360.

Combine like terms:

Divide both sides by 12:

We know now substitute x for 30 in for all of the side lengths.
∠ABC = 4x =
°
∠BCD = 3x =
°
∠CDA = 2x =
°
∠DAB = 3x =
°
Hope this helped!
Answer:
x^3 - x
Step-by-step explanation:
x(x^2 + x - 1) - x^2 =
= x^3 + x^2 - x - x^2
= x^3 - x