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3 years ago

If AB=CB Then CB = AB

Mathematics

1 answer:

Alona [7]3 years ago

3 0

Answer:

True. If the length of AB is equal to CB. then CB is equal to AB.

I hope this helps

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Is 2cosx=cos2x ? i have misinterrupted

faltersainse [42]

no it isn't. 2cos(x) is 2 multiplied by cos(x), cos (2x) is cos(2 multiplied by x) meaning 2x is the angle you're taking the cosine of. if you want to know what cos(2x) look up the double angle rule.

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3 years ago

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A rectangle an an area of 30 square meters anda has dimensionsperimeter of 34 meters. What are the of the rectangle

vazorg [7]

The sides of the rectangle are:
xy = 39
2x + 2y

Solve by simultaneous equation:
ysquared -17y + 30 = 0

Solution:
The sides are equal to 15 and 2

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3 years ago

Jessica knows that the adult population gets, on average, eight hours of sleep each night. A hypothesis test can help her see if

Nitella [24]

Answer:

-4.42

Step-by-step explanation:

Given the following :

Population mean (pm) = 8 hours

Sample mean (sm) = 6.9 hours

Number of observations (n) = 101 students

Sample standard deviation (sd) = 2.5

Using the t-statistic formula :

[(sm - pm) / (sd/√n)]

Hence,

[(6.9 - 8) / (2.5/√101)]

[(-1.1) / (2.5/10.05)]

-1.1 / 0.2487562

= −4.422

The test statistic = - 4.42 to the nearest hundredth.

6 0

3 years ago

100 Points!!!!!!!!!! please hurry with full explanation of how you got the answer if not i guess thats okay just an asnwer will

kaheart [24]

Here, Alicia is wrong because on evaluating $3 ^{1.4}$ we get $4.65554$ which is of course less than 6. Zara's calculation could be;

$3 ^{1.4} \\ \\ 3 ^{ \frac{7}{5} } \\ \\ \sqrt[5]{3 ^{7} } \\ \\ 3 \sqrt[5]{3 ^{2} } \\ \\ 3 \sqrt[5]{9} \\ \\ = 4.6554$

<h3>Final answer:-</h3>

Zara's calculations are correct and alicia's calculations are wrong.

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2 years ago

Question:Choose the correct scale factor: A)2 B)1/2 C)3 D)1/3

aleksandrvk [35]

The length of ND = 3 units

The length of N'D' = 6

6 / 3 = 2

The scale factor is 2

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3 years ago

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