Answer:
Two expression are:
Step-by-step explanation:
Let rt triangle ABC.
Now, labeling the parts of a right triangle.
Let the right angle be labelled C and the hypotenuse c and
A and B denote the other two angles, and a and b the sides opposite them respectively.
In a right triangle ABC,
the trigonometric ratio is given by:
Therefore, the two expression which is equivalent to is ;
Answer:
Step-by-step explanation:
Tthe population is normally distributed and the sample size is .
Since the population standard deviation is unknown and the sample standard deviation , must replace it, the t distribution must be used for the confidence interval.
Hence with degrees of freedom of 21, .(Read from the t distribution table)
The 98% confidence interval can be constructed using the formula:
.
From the question the sample mean is dollars and the sample standard deviation is dollars.
We substitute the values into the formula to get
Therefore, we can be 98% confident that the population mean is between is between 19.22 and 44.78 dollars.
Answer:
(x-1)(4x-9)
Step-by-step explanation:
Answer:
if the "x" is a multiplication symbol, the answer is 2.
Step-by-step explanation:
Answer:
x=49 or B)49
Step-by-step explanation:
its is a linear pair so that means it is equal to 180 degrees
you equation will be
x-18+149=180 simplify
x+131=180 subtract 131 from both sides
x=49