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nekit [7.7K]
3 years ago
13

Given a rectangle with a length of 21 cm and a width of 3 cm, which rectangle is similar?

Mathematics
1 answer:
Aliun [14]3 years ago
5 0

Answer:

The answer is C

Step-by-step explanation:

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What is the slope of the line with the equation 3x = -y − 5
prisoha [69]

This equation is written in <em>standard form</em>, so we need to change it into <em>slope-intercept form.</em>

<em />

3x = -y - 5

3x + y = -y + y - 5

3x + y = -5

3x - 3x + y = -5 - 3x

y = -5 - 3x

y = -3x - 5

The slope is classified as "m" in this type of equation, so, the slope is -3.

Best of Luck!

8 0
3 years ago
Read 2 more answers
Instructions: Problem 1 ! Find the missing angle in the image below. Do not include spaces in your answers
sweet-ann [11.9K]

Answer:

40 degrees

Step-by-step explanation:

The 100 degree angle is supplementary to angle CED. This means CED will end up being 80 degrees. Since the angles in all triangles equate to 180 degrees 80 + 60 + angle D must equal 180 degrees. Therefore, angle D has to be 40 degrees.

5 0
3 years ago
4 people are on the team. Members will be chosen randomly to serve as chairperson, treasurer, secretary, or timekeeper . Noor is
aliina [53]

Answer:

Step-by-step explanation:

Given that  four people are on the team. Members will be chosen randomly to serve as chairperson, treasurer, secretary, or timekeeper

Since one person cannot serve two posts we have total number of ways

= 4(3)(2)(1) = 24

If Noor is chair person and Qu treasurer then remaining 2 can take two posts in 2 different ways

So probability that Noor is selected to be chairperson and Qu is selected to be treasurer

=favourable outcomes/total outcomes

= \frac{2}{24} \\=0.083

8 0
3 years ago
A data includes 108 body temperature od healthy adult humans having a mean of 98.2 f and a standard deviation of .64f. Contruct
leonid [27]

Answer: ( 98.04f, 98.40f ), it is not accepted

Step-by-step explanation: the question is suggesting we construct a 99% confidence interval for mean body temperature.

The formulae for Constructing a 99% confidence interval is given below as

u = x + Zα/2 × (s/√n)........... For the upper limit

u = x - Zα/2 × (s/√n)........... For the lower limit

Where u = population mean

x = sample mean = 98.2

s = sample standard deviation = 0.64

n = sample size = 108.

Zα/2 = critical value for a 2 tailed test performed at a 1% level of significance ( 100% - 99%) = 2.58

We are making use of our z test because sample size is greater than 30 ( n = 108).

By substituting the parameters, we have that

For upper limit

u = x + Zα/2 × (s/√n)

u = 98.2 + 2.58 ( 0.64/√108)

u = 98.2 + 2.58 ( 0.0616)

u = 98.2 + 0.1589

u = 98.4

For lower limit

u = x - Zα/2 × (s/√n)

u = 98.2 - 2.58 ( 0.64/√108)

u = 98.2 - 2.58 ( 0.0616)

u = 98.2 - 0.1589

u = 98.04.

Hence the 99% confidence interval for mean temperature of human is ( 98.04f, 98.40f )

Using 98.6f as the average mean body temperature is wrong because it is out of the confidence interval calculated above.

Our confidence interval states that at 99% confidence interval, an average human temperature should be at least 98.04f and at most 98.40f.

98.6f is out of the range.

4 0
3 years ago
C) 025./ = 6.257 X 10
Yanka [14]

Answer:

Step-by-step explanation:

you divide 025./=6.257 x 10 is 5

6 0
3 years ago
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