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Dmitrij [34]
1 year ago
8

Select the correct answer from each drop-down menu.Complete the following proof.Given: WXYZ is a parallelogram with diagonals XZ

and WY intersecting at point VProve: XZ bisects WYProof:StatementsReasons1. WXYZ is a parallelogram with

Mathematics
1 answer:
ohaa [14]1 year ago
8 0

GIVEN:

We are given a parallelogram WXYZ with diagonals WY and XZ.

Required;

Prove that XZ bisects WY.

Explanation;

From the diagram provided, we can draw the following conclusion;

\begin{gathered} \angle WXY\cong\angle YZW \\  \\ \angle WXZ\cong\angle YZX \\  \\ Alternate\text{ }interior\text{ }angles \end{gathered}

Also, we have;

\begin{gathered} \Delta WZV\cong\Delta YXV \\  \\ SAS\text{ }congruency\text{ }criteria \end{gathered}

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skad [1K]
Mathspapa a website that will help.
6 0
3 years ago
Scores on a national math test are Normally distributed, with a mean score of 490 and a standard deviation of 50. Which test sco
alisha [4.7K]

Answer:

532

Step-by-step explanation:

The score that represents the top 20% = A score = 80%

Z score for 80% percentile = 0.842

We solve using the z score formula

z = (x-μ)/σ, where

x is the raw score = ??

μ is the population mean = 490

and σ is the population standard deviation = 50

Hence:

0.842 = x - 490/50

Cross Multiply

0.842 × 50 = x - 490

x = 0.842 × 50 + 490

x = 42.1 + 490

x = 532.1

Approximately = 532

Therefore, the test score = 532

7 0
3 years ago
Read 2 more answers
I need help with an area math question
Ede4ka [16]

Answer:

Step-by-step explanation:

Area of outer triangle = \dfrac{4x*(4x+3)}{2}= 2x*(4x +3)

                                    = 2x*4x + 2x*3

                                   = 8x² + 6x

Area of inner triangle= \dfrac{2x*(2x+5)}{2}=x*(2x+5)=x*2x+x*5=2x^{2} + 5x

Area of aluminium = area of outer triangle - area of inner triangle

                        = 8x² + 6x + 2x² + 5x

                        = 10x² + 11x

Area of 20 aluminum borders = 20*(10x² + 11x)  = 200x² + 220x

b) x = 25 cm

Area of 20 aluminum borders = 200*25² + 220*25

                                                  = 200 * 625 + 220*25

                                                 = 125000  + 5500

                                                  = 130500 cm²

c) Area of inner triangle (Glass) = 5500 cm²

Cost of aluminium = 130500 * 0.06 = $ 7830

Cost of glass = 5500 * 0.03 = $ 165

Cost of making 20 windows =  7830 + 165 = $ 7995

7 0
3 years ago
I need help with this question please and thank you
inna [77]

d-13=5 is actually suppose to be solved liek this:

d - 13 = 5

   +13   +13

The absoulte value of 13 is 13, it is negative so you have to add 13 to get to 0 so it can be cancelled out.

5 0
3 years ago
Mei and Anju are sitting next to each other on different horses on a carousel. Mei's horse is 3 meters from the center of the
SOVA2 [1]

Answer:

2\pi \approx 6.28\ meters

Step-by-step explanation:

Mei's horse is 3 meters from the center of the carousel. After one rotation, Mei travelled

l_M=2\pi r=2\pi \cdot 3=6\pi\ meters

Anju's horse is 2 meters from the center. After one rotation, Mei travelled

l_A=2\pi r=2\pi \cdot 2=4\pi\ meters

The difference in their travelled distances is

l_M-l_A=6\pi -4\pi =2\pi \approx 6.28\ meters

5 0
4 years ago
Read 2 more answers
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