Pls help If the regular price of an item is x dollars, what is the discount price in dollars? Write an expression.

x * (1 - discount percentage)

Step-by-step explanation: You have x in original price, if it is 30% off now, it the price of the discounted item will be x * ( 1 - 30%) = 0.7X. This basicaly means that you take off 30% of what is there which is 100%.

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180