Answer:
C. 85.0 degrees. Because...
Coz when you calculate the angles all together using the 180°. You'll find the right answer
Lets get started :)
a) m(x) = (x - 5)(3 + 2x) - x² + 25
↓
Open Brackets
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= (x × 3) + (x × 2x) + (-5 × 3) + (-5 × 2x) - x² + 25
= 3x + 2x² - 15 - 10x - x² + 25 (Bring like-terms together in descending power order)
= 2x² - x² + 3x - 10x - 15 + 25
= x² - 7x + 10
b) In x² - 7x + 10, -7 is the sum and + 10 is the product
- 2 + - 5 = -7
- 2 × -5 = 10
So the factor of x² - 7x +10 is:
↓
(x - 2)(x - 5)
Solving ( x - 2 )( x - 5 ) = 0
↓ ↓
x - 2 = 0 | x - 5 = 0
x = 2 | x = 5
A circle is one shape that can be reflected
Hope this helps :)
Answer: x = 75°
Steps:
180 - 155 = 25
80 + 25 + x = 180
105 + x = 180
x = 180 - 105
x = 75
Check:
80 + 25 + x = 180
80 + 25 + 75 = 180
180 = 180 ✅
I would appreciate the brainliest if this was helpful correct and had clear steps! :)
Answer:
45 sides
Step-by-step explanation:
Using the property:
Interior angle + exterior angle = 180°
exterior angle = 8°
now, using the formula:
number of sides = 360/exterior angle
number of sides = 360/8
number of sides = 45 ANS.