Answer:
15° , 45°, 120°
Step-by-step explanation:
sum the parts of the ratio, 1 + 3 + 8 = 12 parts
the sum of the 3 angles in a triangle = 180° , then
180° ÷ 12 = 15° ← value of 1 part of the ratio, then
3 parts = 3 × 15° = 45°
8 parts = 8 × 15° = 120°
the 3 angles are 15° , 45° , 120°
Find the solution set of x: x^2-7x= - 10.
Answer:
(x − 2)(x −5)
Step-by-step explanation:
x² - 7x = - 10
x² - 7x + 10 = 0
Find two numbers that when added together make −7 , and when multiplied make - 10.
The numbers − 2 and −5 fit the criteria.
x2− 7x + 10 = (x − 2)(x −5)
Answer: X=-3
Step-by-step explanation:
-4(-2x+5)-5x+5=-24 (=) [(-4×-2x)+(-4×5)]-5x+5=-24 (=) [(8x)+(-20)]-5x+5=-24 (=) 8x-20-5x+5=-24 (=) 3x-15=-24 (=) 3x=-9 (=) x=-9/3 (=) x=-3