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2 years ago

Which explanation best completes the proof that QRST is square? Will give Brainlest

Mathematics

2 answers:

geniusboy [140]2 years ago

8 0

Answer:

It's the top one. No further explanation is needed.

Step-by-step explanation:

We know that a square is made-up of four equivalent sides, and four right angles. So, by process of elimination, you are left with the top one.

Another way of getting the same answer is we know that the only quadrealateral with four equivalent sides is a square, so the top answer is correct.

There you have two, different explainations and ways of getting the same answer, proving that it is correct. Hope that helps!

dsp732 years ago

5 0

Answer:

It's the top one.

Step-by-step explanation:

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80 members decreased by 65%

prisoha [69]

There are now 28 members
all you do is 80 times 0.65 = 52
but you still have to subtract 80 - 52 to find the number of members left
SOOOO
28 members still there
52 members quit

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3 years ago

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sally needs $20,000 in 4years. she has $10,000 to invest. if interest is compounded continuously, what rate is required for Sall

I am Lyosha [343]

10,000 Because you need to add 10,000 add its going to give you 20,000

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3 years ago

A water storage tank has the shape of a cylinder with diameter 14 ft. It is mounted so that the circular cross-sections are vert

andrezito [222]

Answer:

percentage of the total capacity is 75.6%

Step-by-step explanation:

Hello! To solve this problem we follow the following steps

1. draw the complete scheme of the problem (see attached image)

2. To solve this problem we must find the area of the circular sector using the following equation.(c in the second attached image)

$A=\frac{R^2}{2} (\alpha -sin\alpha )$

$\alpha =2arccos(\frac{d}{R})$

3. observing the attached images we replace the values in the equations and find the area of the circular sector, remember that you must transform the angle to radians

$\alpha =2arccos(\frac{5}{7})=88.83$

$A=\frac{R^2}{2} (\alpha -sin\alpha )\\A=\frac{7^2}{2} (88.83-sen88.83)*\frac{\pi rad}{180} =37.57ft^2$

4.we calculate the area of the total circle (At), then subtract the area of the circular sector (Ac) to find the area occupied by water (Aw)

$At=\frac{\pi }{4} (14ft)^2=153.93ft^2$

Aw=At-Ac=153.93-37.57=116.36ft^2

5.Finally, we calculate the percentage that represents the water in the tank by dividing the area of the water over the total area of the tank

$\frac{116.36}{153.93} *100=75.6$

percentage of the total capacity is 75.6%

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3 years ago

Will give me a 20% discount if I spend over $50 my bill is $75.What is my final bill after the savings

Andrews [41]

Hey there,
$75 is above $50
Final Bill = $75 - (20% x $75)
= $75 - $15
= $ 60

Hope this helps :))

<em>~Top♥</em>

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3 years ago

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The stem-and-leaf plot shows the temperatures of patients who registered at a clinic one day. How many patients registered at th

saveliy_v [14]

As the key suggests, the left part is the integer part of the number, while the digit on the right is the decimal part of the number.

So, for example, the first row describes the two values 97.2 and 97.8, while the second row describes the values 98.1, 98.3 (repeated twice), 98.5, 98.6 and 98.7 (repeater three times).

So, the number of values is given by the number of leaves: you simply have to count how many digits are there on the right part of the screen.

The answer is thus 24

5 0

3 years ago