Step-by-step explanation:
Angle ADB + Angle BDC = 90° (right angle)
Since Angle ADB = Angle BDC,
Angle BDC = 90° / 2 = 45°.
The best answer for this question is A.
Best of luck.
Answer: 4xy(y² + 2x)
Step-by-step explanation:
When we have brackets like this, we multiply whatever is left of the brackets by everything inside.
1) 4xy multiplied by y²
4xy x y² = 4xy³
2) 4xy multiplied by 2x
4xy x 2x = 8x²y
3) Add together 4xy³ and 8x²y
4xy³ + 8x²y
A real number = x or any variable
It would be x ≥ 5.5