(3x + 13) + (8x + 14) + 109 = 180°
(3x + 13) + (8x + 14) = 71°
11x + 27 = 71°
11x = 44°
x = 4
The way Maria calculates the final price of the book is correct. We know that the book normally sells for $26.50 plus a 10% sales tax. We also know that the students will receive an additional 25% discount. We must understand that the sales tax is applied to the discounted price. So first we will calculate 25% of 26.50 and subtract it from that amount. So the price will then be: (26.50 - 6.625). The price is now $18.34. Then to calculate the tax, it will be (10% * 18.34), so 1.834. We add this amount to the discounted price so: (18.34+1.834) = 20.12.
The final price of the book is $20.12 and Maria can get it and still save a little money
(x + 5)(x² - 3x)
Use FOIL (First, Outside, Inside, Last)
x(x²) = x³
x(-3x) = -3x²
5(x²) = 5x²
5(-3x) = -15x
Combine like terms:
x³ - 3x² + 5x² - 15x
x³ + 2x² - 15
x³ + 2x² - 15 is your answer
hope this helps
Answer:
Step-by-step explanation:
The last two
