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2 years ago

Determine whether each data set description represents a sample or complete information?

Mathematics

2 answers:

rusak2 [61]2 years ago

5 0

Answer:

Step-by-step explanation:

Final grades earned by all 30 students enrolled in a math class: complete information

Names of states on license plates for every fifth car on two floors of a parking garage at the mall:

Number of emails received in one account every day from the day it was created until it was canceled:

Sample

Number of pennies, nickels, dimes, quarters, and other types of currency contained in a piggy bank:

Sample

Price of a specific brand and flavor of soup based on search engine results for national supermarket chains:

complete information

CaHeK987 [17]2 years ago

4 0

Answer:

1, sample.

2, sample

3, complete

4, complete

Step-by-step explanation:

If i am wrong, please let me know. i will give points back + a few extra.

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Given that tangent theta = negative 1, what is the value of secant theta, for StartFraction 3 pi Over 2 EndFraction less-than th

Rashid [163]

Answer:

$sec(\theta)=\frac{2}{\sqrt{2} }=\sqrt{2}$

Step-by-step explanation:

Start by noticing that the angle $\theta$ is on the 4th quadrant (between $\frac{3\pi}{2}$ and $2\pi$ . Recall then that in this quadrant the functions tangent and cosine are positive, while the function sine is negative in value. This is important to remember given the fact that tangent of an angle is defined as the quotient of the sine function at that angle divided by the cosine of the same angle:

$tan(\theta)=\frac{sin(\theta)}{cos(\theta)}$

Now, let's use the information that the tangent of the angle in question equals "-1", and understand what that angle could be:

$tan(\theta)=\frac{sin(\theta)}{cos(\theta)}\\-1=\frac{sin(\theta)}{cos(\theta)}\\-cos(\theta)=sin(\theta)$

The particular special angle that satisfies this (the magnitude of sine and cosine the same) in the 4th quadrant, is the angle $\frac{7\pi}{4}$

which renders for the cosine function the value $\frac{\sqrt{2} }{2}$ .

Now, since we are asked to find the value of the secant of this angle, we need to remember the expression for the secant function in terms of other trig functions: $sec(\theta)=\frac{1}{cos(\theta)}$

Therefore the value of the secant of this angle would be the reciprocal of the cosine of the angle, that is: $sec(\theta)=\frac{2}{\sqrt{2} }=\sqrt{2}$

6 0

2 years ago

Read 2 more answers

The average temperature for four days days was 22 degrees what must the temperature be on the fifth day in order to make 23 degr

galina1969 [7]

Answer:

27 degrees.

Step-by-step explanation:

If the average is to be 23 degrees over 5 days then the total of the temperatures will be 5*23 = 115 degrees.

The total over the first 4 days = 22*4 = 88 degrees, so the temperature on the fifth day has to be 115 - 88 = 27 degrees.

5 0

2 years ago

Label each part of the equation. Write operation or variable<br> N-100+r=54

Readme [11.4K]

The answer is n= 154 - r

6 0

2 years ago

Business services ordered a chair that cost $220.59. Upon arrival they received an invoice for $261.47. If the California sales

sladkih [1.3K]

Answer:

Cost of shipping and handling = $23.453

Step-by-step explanation:

Given

Price of Chair=$220.59

Tax=7.9%

Invoice Price=$261.47

In order to find the cost of shipping and handling, we have to subtract the cost of chair and the tax from the invoice price of chair.

To find the tax,

Tax amount=220.59*0.079

=$17.42661

Now,

Cost of shipping and handling=$261.47-$220.59-$17.42661

=$23.453 ..

6 0

2 years ago

Read 2 more answers

Quadrilateral WXYZ has vertices W(-4,-3), X(0,-1). Y(6,-2), Z(2,-4). Using properties of diagonals prove that WXYZ is a parallel

yanalaym [24]

Answer:

The diagonals are bisectors of each other and meet at (1, -5/2) but are not congruent, so WXYZ is a parallelogram and not a rectangle

Step-by-step explanation:

for parallelograms.

the diagonals intersect at the midpoints

W X

Z Y

Diagonals are WY and XZ

WY : (-4, -3) to (6, -2)

midpoint is [(-4 + 6)/2 , (-3 - 2)/2 ] = ( 1, -5/2 )

XZ : (0, -1) to (2, -4)

midpoint is [ (0 + 2)/2 , (-1 + -4)/2 ] = (1, -5/2)

The diagonals are bisectors of eachother.

Next show that these diagonals are not congruent.

length of WY = root ( (-4 - 6)^2 + (-3 - (-2))^2 )

WY = root ( 100 + 1)

WY = root(101)

length of XZ = root ( (0 - 2)^2 + ( -1 - -4)^2 )

XZ = root (4 + 9) = root (13)

we see that WY is not equal to XZ

...

so .. quadrilateral WXYZ is a parallelogram but not a rectangle.

8 0

2 years ago