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zloy xaker [14]
3 years ago
7

Sandra wants to evaluate 2 cot Her work is shown below. What did she do wrong?

Mathematics
1 answer:
Natalija [7]3 years ago
3 0

Answer: The first option.


Step-by-step explanation:

1. To solve this exercise you need to remember that:

- An even function is a function with the following property:

f(-x)=f(x)

- An odd function  is a function with this property:

f(-x)=-f(x)

2. By definition, the contangent is an odd function, therefore you have that:

cot(-θ)=-cot(θ)

Then:

2cot(-\frac{9\pi}{2})\neq2cot(\frac{9\pi}{2})

3. So, you can coclude that the first step is wrong. Therefore, the answer is the first option.

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Plz hlp Translate the following phrase to an expression: the difference between twenty and twice a number.
Mazyrski [523]
20 - 2n

Difference means taking away
Two times a number means whatever n is it is multiples by 2 and subtracted from 20
4 0
3 years ago
Please help me ASAP!!! I will give 20 points..... bad answers will be reported
belka [17]
150? I think thats the anwser
3 0
3 years ago
A real estate company wants to build a parking lot along the side of one of its buildings using 800 feet of fence. If the side a
Elden [556K]

Answer:

80,00ft^{2}

Step-by-step explanation:

According to my research, the formula for the Area of a rectangle is the following,

A = L*W

Where

  1. A is the Area
  2. L is the length
  3. W is the width

Since the building wall is acting as one side length of the rectangle. We are left with 1 length and 2 width sides. To maximize the Area of the parking lot we will need to equally divide the 800 ft of fencing between the <u>Length and Width.</u>

800 / 2 = 400ft

So We have 400 ft for the length and 400 ft for the width. Since the width has 2 sides we need to divide 60 by 2.

400/2 = 200 ft

Now we can calculate the maximum Area using the values above.

A = 400ft*200ft

A = 80,000ft^{2}

So the Maximum area we are able to create with 800 ft of fencing is 80,00ft^{2}

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

Read more on Brainly.com - brainly.com/question/12953427#readmore

3 0
2 years ago
What value of x makes the equation 5 (x-1)-8= -5 +4 (x-2) true?<br> need anwser asap
Mnenie [13.5K]

Answer:

you haft to

Step-by-step explanation:

tgake the 6 and the 1 and divide it by 468. then you have to do 1 + 76 and u get anser. hope you liked anser :)

6 0
3 years ago
Read 2 more answers
Someone please help me with this ? Explain and give steps
Drupady [299]
Its an isosceles triangle

angle B = 47

and triangleADB is congruent to triangle ADC

from here we can say that BD = DC

now AD is a median and also altitude

so from here we can say angle x = 90

now in triangle ADB

90+47+y=180(ANGLE SUM PROPERTY )

y= 43
5 0
3 years ago
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