To get the type of triangle mentioned we need to find the value of x first. Sum of angles in a triangle add up to 180°, thus 2x+(3x-15)+(7x+15)=180 2x+3x-15+7x+15=180 12x=180 x=15° thus the respective sizes will be: 2x=30° 3x-15=30° 7x+15=120° Since the triangle has two congruent angles we conclude that the triangle is called Isosceles triangle
Step-by-step explanation: This means the cost of the item to you is $8.4. You will pay $8.4 for a item with original price of $12 when discounted 30%. In this example, if you buy an item at $12 with 30% discount, you will pay 12 - 3.6 = 8.4 dollars.