4 years ago

Solve x^2-8x-9=0 algebrically

1 answer:

7 0

Answer:

X = 9, -1

Step-by-step explanation:

1, Factor it

(x-9) (x+1) = 0

2. Both of a factor will = 0

x-9 = 0

x+1=0

3. Solve

x=9

x=1

You might be interested in

quester [9]

Step-by-step explanation:

4/3-1/2

=8-3/6

=5/6

thanks for the question

6 0

3 years ago

icang [17]

Answer:

Option B) data from the sample is used to estimate the population parameter

Step-by-step explanation:

Point estimation:

Its is the process of getting a point estimate from a sample that describes a population parameter in the best way.
We calculate the unknown population parameter with the help of a sample drawn from the population.
It is similar to interval estimation.
In interval estimation we obtain an interval in which the population parameter may lie but in point estimation we obtain a single value which is the best approximation of population parameter.

Thus, the correct answer is

Option B) data from the sample is used to estimate the population parameter

4 0

3 years ago

nekit [7.7K]

Answer:

Step-by-step explanation:

there are 100 cm in 1 m

400/100 = 4

8 0

3 years ago