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4 years ago

Pls help n explain what to do

Mathematics

2 answers:

monitta4 years ago

8 0

Answer:

Step-by-step explanation:

12*0.75=9

To find this do 9/12.

4*0.75=y

y=3

Anuta_ua [19.1K]4 years ago

5 0

Answer:

the answer is the blue one =3

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3 years ago

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These are for corrections. What is number 15?

valentina_108 [34]

Answer:

$x = 2\sqrt{10}$

Step-by-step explanation:

We have to solve for x from the logarithmic equation as follows:

$\log x^{2} + \log 25 = 3$

⇒ $\log 25x^{2} = 3$

{Since, using logarithmic property $\log A + \log B = \log AB$ }

Now, converting this logarithmic equation above into exponential equation we get,

$25x^{2} = 10^{3}$

{Since we know that if $\log_{10}a = b$ then, we can write $a = 10^{b}$ }

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3 years ago

You multiply two integers. You increase one of them by 1 and decrease the other

snow_tiger [21]

Integers are numbers without decimals

The integers could you have multiplied are 9 and 2

Let the numbers be x and y

So, we have:

$\mathbf{x \times y}$

Increase x by 1 and reduce y by 1.

So, we have

$\mathbf{(x +1) \times (y -1) = 6 + xy }$

Open brackets

$\mathbf{xy -x + y - 1 = 6 + xy}$

Subtract xy from both sides

$\mathbf{ -x + y - 1 = 6}$

Collect like terms

$\mathbf{ -x + y = 6 + 1}$

$\mathbf{ -x + y = 7}$

Rewrite as:

$\mathbf{ y -x= 7}$

The above means that, the difference between the integers is 7.

There are several integers that fit the above <em>description</em>;

One possibility is: 9 and 2