Answer:
x = - 3 ± 3
Step-by-step explanation:
given the equation x² + 6x - 9 = 0
We can solve for x using the quadratic formula
x = ( - b ± ) / 2a
with a = 1, b = 6 and c = - 9
x = ( - 6 ± ) / 2
= ( - 6 ± ) / 2
= ( - 6 ± ) / 2
= ( - 6 ± 6 ) / 2
x = - 3 ± 3
Answer:
Even
Step-by-step explanation:
Answer:
n=10
Step-by-step explanation:
The given equation is
...(1)
Let nth term is 2n.
We need to find the values of n.
It is clear that is sum of A.P., whose first term is 10 and common difference is 2.
Sum of A.P. is
where, a is first term and d is common difference.
Substitute a=10 and d=2 in the above formula.
...(2)
From (1) and (2), we get
Splitting middle term, we get
Since, n represents the number of terms so n cannot be a negative number, therefore number of term is 6.
Note: nth term and variable n both are different.
Sixth term is 20. So,
Therefore, the value of n is 10.
Answer:
The volume = 5 276.66928645188 cm³
Step-by-step explanation:
let V be the volume of the given sphere.
V = (4/3)×π×r³ ,where r is the radius of the sphere
r = 21.6÷2 = 10.8 cm
Then
V = (4÷3)×π×(10.8)³
= 5 276.66928645188 cm³
Quadrilateral
trapezoid
isosceles trapezoid
parallelogram