Answer:
x² - 8x + 20
= x²- 2*4*x + 16 + 4
= x²- 2*4*x + 4² + 4
= (x - 4)² + 4
= (x - a)² + a, with a = 4
Hope this helps!
Answer:
30 degrees
Step-by-step explanation:
triangles have 180 degrees
right triangles have a right angle which is 90 degrees
180-90=90
90-60=30
Answer:No
Step-by-step explanation:
Pi is irrational
C, because 6 can go into 3 twice and 2 because 4 go into 2
Answer:
Step-by-step explanation:
take 30 degree as reference angle
using cos rule
cos 30=adjacent/hypotenuse
/2=7
/y(do cross multiplication)
14
=y
14
/
=y
14=y
for x
using pythagorsa theorem
H^2=P^2+B^2
14^2=X^2+(7
)^2
196=X^2+147
196-147=X^2
49=X^2
=X
7=X