First of all let x-1=0
x=1
Therefore,
P(x)=2x^4+4x^3-7x^2-kx+9
P(1)=2(1)^4+4(1)^3-7(1)^2-k(1)+9
2(1)+4(1)-7(1)-k+9=0
2+4-7-k+9=0
15-7-k=0
8-k=0
-k=-8
Therefore,k=8
Answer:
3
Step-by-step explanation:
7 1/2 ÷ 2 1/2
=15/2 ÷ 5/2
=15/2 ×2/5
=3
Answer:
x = 6
Step-by-step explanation:
Since the triangles are similar then the ratios of corresponding sides are in proportion, that is
= 
, substitute values
= 
= 
( cross- multiply )
2x = 12 ( divide both sides by 2 )
x = 6
-8 (is less than or equal to) x ( which is less than) 3
Or [-8,3)
X=5.5 i think is the answer
