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Oksana_A [137]
2 years ago
14

Combine the radicals 4√7+3√28.

Mathematics
2 answers:
Ierofanga [76]2 years ago
8 0

Answer:

10√7    

Step-by-step explanation:

To combine the radicals, you must have the same number under both radicands. Luckily, you can simplify one of the radicands. This is done by separating the radicand (√28) into its common factors (√4 x √7) and taking the square root of one of the factors (√4 = 2).

4√7 + 3√28                                 <---- Original expression

4√7 + 3(√4 x √7)                         <---- Expand √28

4√7 + (3 x 2)√7                           <----- Take √4

4√7 + 6√7                                   <---- Multiply coefficients

10√7                                            <---- Add both terms

notka56 [123]2 years ago
6 0

Answer:

10√7

Step-by-step explanation:

4 \sqrt{7}  + 3 \times 2 \sqrt{7}  \\ 4 \sqrt{7}  + 6 \sqrt{7}  \\ 10 \sqrt{7}

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kozerog [31]

Answer: compare the relative strength of coefficients.

Step-by-step explanation: The Coefficient of determination usually denoted as R^2 is obtained by taking the squared value of the correlation Coefficient (R). It's value ranges from 0 to 1 and the value obtained gives the proportion of variation in the dependent variable which could be attributed to it's correlation or relationship to th independent variable. With a R^2 value close to 1, this means a large portion of Variation in a variable A could be explained due to changes in variable B while a low value signifies a low variance between the variables. Hence, the Coefficient of determination is used in comparing the relative strength of the Coefficients in other to establish whether a weak or strong relationship exist.

6 0
3 years ago
In a continuous series, mean(x) = 80, assumed mean(A) = 60 and<br>EF=40 then find the value of EFd.​
Aneli [31]

Using the given information, the value of Σfd is 800

<h3>Calculating mean using Assumed mean </h3>

From the question, we are to determine the value of Σfd

The formula for mean, using the assumed mean method is given by

\bar x = A + \frac{\sum fd}{\sum f}

Where \bar x is the mean

A is the assumed mean

From the given information,

\bar x = 80

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\sum f = 40

Putting the parameters into the equation, we get

80 = 60 + \frac{\sum fd}{40}

80-60 = \frac{\sum fd}{40}

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Learn more on Mean here: brainly.com/question/20118982

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8 0
2 years ago
Please someone help quickly!!!
Alisiya [41]

Answer:

f (-1) = 3

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Step-by-step explanation:

f (-1) = 3

f (0) = -7

f (2) = -7

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Answer:

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Step-by-step explanation:

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anyanavicka [17]

Answer:

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Step-by-step explanation:

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⇒ total cost of camp = (34.20 ÷ 15) x 100 = $228

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