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3 years ago

-11 + 3(b + 5) = 7

Mathematics

2 answers:

irakobra [83]3 years ago

8 0

Step-by-step explanation:

-11 + 3(b + 5) = 7

-11 + 3b + 15 = 7

3b + 4 = 7

3b = 3

b = 1

Anna71 [15]3 years ago

8 0

Answer: The answer is A. 1.

Step-by-step explanation:

-11 + 3(b + 5) = 7 Start by distributing the 3. 3xb and 3x5.

-11 + 3b + 15 = 7 Next combine all like terms. -11 + 15.

4 + 3b = 7 You want to get b by itself so move the 4 using subtraction. ..................................4-4 and 7-4

3b = 3 B is still not by itself. Now we must divide 3 by 3 and 3 by 3.

b = 1

Hope this helped. I explained the best I could.

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3 years ago

Jim's work evaluating 2 (three-fifths) cubed is shown below. 2 (three-fifths) cubed = 2 (StartFraction 3 cubed Over 5 EndFractio

sammy [17]

Answer:

Jim's error is " He did not multiply Three-fifths by 2 before applying the power "

Step-by-step explanation:

Jim's evaluating expression is $2(\frac{3}{5})^3$

To verify Jim's error :

Jim's steps are

$2(\frac{3}{5})^3$

$=2(\frac{3^3}{5})$

$=2(\frac{3\times 3\times 3}{5})$

$=2(\frac{27}{5})$

$=\frac{54}{5}$

Therefore $2(\frac{3}{5})^3=\frac{54}{5}$

Jim's error is " He did not multiply Three-fifths by 2 before applying the power "

That is the corrected steps are

$2(\frac{3}{5})^3$

$=2(\frac{3^3}{5^3})$ ( using the property $(\frac{a}{b})^m=\frac{a^m}{b^m}$ )

$=2(\frac{3\times 3\times 3}{5\times 5\times 5})$

$=2(\frac{27}{125})$

$=\frac{54}{125}$

$2(\frac{3}{5})^3=\frac{54}{125}$

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3 years ago

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Olenka [21]

Answer:

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Given:

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Using formula:

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3 years ago

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