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PolarNik [594]
3 years ago
12

Item 5 Solve for b. − 1 3 b=9 What is the answer?

Mathematics
2 answers:
snow_lady [41]3 years ago
7 0

Answer:

b = -27

Step-by-step explanation:

-1/3 b = 9

Multiply each side by -3

-3 * -1/3 b = -3 * 9

b = -27

Cerrena [4.2K]3 years ago
7 0

Answer:

For b=\frac{9}{-13} so that -13 \times b=9 .

Step-by-step explanation:

Given expression

- 13 b = 9

Here, -13 is multiplied with b  on solving it gives 9 as answer.

We have to find b so that when it is multiplied with -13 it gives answer as 9.

-13 \times b=9

When -13 is taken to other side operation gets inverse (multiplication changes to division) and -13 goes other side in denominator as,

\Rightarrow b=\frac{9}{-13}

Thus, for b=\frac{9}{-13} so that -13 \times b=9 .

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Which equation is represented by the phrase a number increased by 3 equals 10 ​
Anna71 [15]
7+3=10 because it’s asking for something that adds 3 and that would equal 10 so the proper equation is 7+3=10 :)
3 0
3 years ago
Identifying an Error
Burka [1]

The incorrect step is ln(x²) = ln(3x/0) because ln(x/y) = lnx - lny and the solutions are x = 0, 3

<h3>What is a logarithm? </h3>

It is another way to represent the power of numbers, and we say that 'b' is the logarithm of 'c' with base 'a' if and only if 'a' to the power 'b' equals 'c'.

\rm a^b = c\\log_ac =b

The question is incomplete.

The complete question is in the picture, please refer to the attached picture.

We have:

2ln(x) = In(3x) - [In(9) - 2ln(3)]

In(x²) = In(3x) - [In(9) - In(9)]

ln(x²) = ln(3x) - 0

ln(x²) = ln(3x/0)   (incorrect step)

ln(x²) = ln(3x)

x² = 3x  (correct step)

x² - 3x =0

x(x - 3) = 0

x = 0, 3

Thus, the incorrect step is ln(x²) = ln(3x/0) because ln(x/y) = lnx - lny and the solutions are x = 0, 3

Learn more about the Logarithm here:

brainly.com/question/163125

#SPJ1

3 0
2 years ago
X^2-x+2=0<br> Please use the quadratic formula
Ainat [17]

Answer:

\boxed{\sf x=\cfrac{1\pm \sqrt{-7} }{2}}

Step-by-step explanation:

\sf x^2-x+2=0

<u>Use quadratic formula:</u>

\boxed{\sf \frac{-b\pm \sqrt{b^2-4ac}}{2a}}

\sf a=1, b=-1, c=2

___________________________

\sf x_1,_2=\cfrac{-\left(-1\right)\pm \sqrt{\left(-1\right)^2-4\times \:1\times \:2}}{2\times \:1}

  • \sf \sqrt{\left(-1\right)^2-4\times \:1\times \:2}
  • \sf =\sqrt{-7}

_________________

\sf x_1,_2\cfrac{-\left(-1\right)\pm \sqrt{-7}}{2\times \:1}

  • \sf -(-1)=1
  • 2\times 1=2

\sf x_1,_2=\cfrac{1\pm \sqrt{-7} }{2}

_______________________________________

<u>Learn more: brainly.com/question/22286698</u>

4 0
2 years ago
What is the percent of 840 is 546
lesantik [10]
K so its an equation      546         x
                                   over   = over
                                   840       100
when u do cross multiplication it will be 840x=546 * 100
                                                       x is about 64%
Hope this is helpful
4 0
3 years ago
8 - 3 ( p - 4 ) = 2p
pogonyaev
 The answer is 4 = P, because you have to distribute then combine like terms.
4 0
3 years ago
Read 2 more answers
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