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3 years ago

Can someone help me with this task please please !!!!

Mathematics

1 answer:

ICE Princess25 [194]3 years ago

7 0

Okay but fist did u read when it says “look back” go to the first page and take a photo to

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What is the correct set of image points for trapezoid W'X'Y'Z'?

Llana [10]

Given:

The figure of a trapezoid.

To find:

The image points of the given figure after rotation of 180 degrees.

Solution:

From the given figure, it is clear that the vertices of the trapezoid are W(-4,2), X(-3,4), Y(-1,4), Z(0,2).

If a figure is rotated 180 degrees about the origin, then

$(x,y)\to (-x,-y)$

Using this rule, we get

$W(-4,2)\to W'(4,-2)$

$X(-3,4)\to X'(3,-4)$

$Y(-1,4)\to Y'(1,-4)$

$Z(0,2)\to Z'(0,-2)$

Therefore, the image points are W'(4,-2), X'(3, -4), Y'(1, -4), Z'(0, -2). So, the correct option is 1.

7 0

3 years ago

In ΔIJK, the measure of ∠K=90°, IJ = 8.6 feet, and KI = 4.5 feet. Find the measure of ∠I to the nearest tenth of a degree.

Zarrin [17]

Answer:

m∠I = 58.4°

Step-by-step explanation:

cos = adjacent side/hypotenuse

It is always helpful to have a picture. In your case KI is adjacent to ∠I and IJ is the hypotenuse.

So cos I = KI/IJ = 4.5/8.6

arccos (4.5/8.6) = m∠I

m∠I = 58.4°

It is necessary for you to memorize the definitions of the trig functions in order to do these types of problems. OK?

5 0

3 years ago

The Wall Street Journal reported that the median salary for middle-level manager jobs was approximately $85,000 (The Wall Street

vredina [299]

Answer:

Median = $80,000 ; Mean = $84,000 ; Q1 = 67,000 ; Q3 = 106,000

Step-by-step explanation:

Given the data :

108 83 106 73 53 85 80 63 67 75 124 55 93 118 77

Reorderd data :

53, 55, 63, 67, 73, 75, 77, 80, 83, 85, 93, 106, 108, 118, 124

The median salary:

1/2(n+1)th term

Sample size, n = 15

1/2 (15 + 1)th term

1/2(16)th term

8th term = 80

Median is $80,000

Median reported by Wall Street Journal approximately $85000

The obtained and reported values are close

The mean annual salary :

ΣX / n = 1260 / 15 = 84

Mean annual salary = $84,000

Mean is the average of all earnings combined, median is the mid value of he data.

First and third quartile :

Q1 = 1/4(n+1)th term

Q1 = 1/4(16)th term

Q1 = 4th term = 67

Third quartile:.

Q3 = 3/4(n+1)th term

Q3 = 3/4(16)th term

Q3 = 12th term = 106

3 0

3 years ago

Samantha buys a shirt that costs $28.50. She uses a

Gre4nikov [31]

Samantha buys a shirt that costs $28.50. She uses a
30% coupon. What will Samantha pay for the shirt?
ANSWER IS 8.55

7 0

3 years ago

What is the formula for ANOVA

Sergio039 [100]

P = 3
n = 5
N = 15
x ¯ = 16
SST = ∑n(x−x ¯ ) 2 
SST = 5(12−16) 2 +5(16−16) 2 +11(20−16) 2 
= 160
MST = SSTp−1 
MST = 1603−1 
= 80
SSE = ∑(n−1)S 2 
SSE = 4*4 + 4*1 + 4*16
= 84
MSE = SSEN−p 
MSE = 8415−3 
MSE = 7
F = MSTMSE 
F = 807 
= 11.429

8 0

3 years ago