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3 years ago

Can somebody explain to me how to do this

Mathematics

1 answer:

sashaice [31]3 years ago

4 0

Basically, a positive hundreds-place multiplication is going to move your decimal to the right by 2 places.

When you multiply the two together (which you can do in a calculator), you get an answer of 68.5. Again, this comes from moving the decimal in 0.685 two places to the right to receive your final answer.

I hope I was able to help. Best of luck.

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Which of the following is equivalent to 2 ln e^ln 5x = 2 ln 15?

neonofarm [45]

Answer:

x = 3

Step-by-step explanation:

Given in the question an equation,

$2lne^{ln5x}=2ln15$

Step 1

$e^{lnx}=x$

so,

$2ln(5x)=2ln15$

Step 2

cancel 2 on both sides of the equation

$ln{5x}=ln15$

Step 3

$ln{5x}-ln15=0$

$ln\frac{5x}{15}=0$

Step 4

$ln\frac{x}{3}=0$

Step 5

$e^{ln\frac{x}{3}}=e^{0}$

Step 6

x/3 = 1

x = 3(1)

x = 3

8 0

3 years ago

C=30m+50 and c=20m+100<br> solve for m pls help

Sholpan [36]

Answer:

m=5

Step-by-step explanation:

c=30m+50

c=20m+100

substitute

20m+100=30m+50

like terms

100-50=30m-20m

50=10m

m=5

6 0

3 years ago

Read 2 more answers

so, im t trying to find the original price and sale price of a book for example and the amount of discount is 2.80 dollars and t

aliya0001 [1]

Okay, so since the discount is 60% of the price and it comes out to $2.8, we are going to form the following expression, where x is the original price.

60% of x = 2.8

Simply means: 60/100 * x = 2.8

You solve for x, which comes out to $4, which is your original price.

5 0

3 years ago

What is "A number decreased by 4 is less than 14" written as an inequality?

navik [9.2K]

Answer:

"A number decreased by 4 is less than 14" written as an inequality is $x$ - 4 < 14

Step-by-step explanation:

First: Figure out what a number decreased by 4 is.

Well, a number decreased by 4, how would that look like? To find out, we should look for some key words in the term. So, I will bold out the keywords in the term this time:

A number decreased by 4

That word 'decreased' gives us a hint. Out of the four basic operations (addition, subtraction, multiplication and division), 'decreased' fits into the subtraction category best. So we can replace 'decreased' with a minus sign. Since we don't know the specific value of 'A number', we will assign it a variable, the variable $x$ . 4 is just 4 so we can leave that number alone. So the first term would look like this:

A number decreased by 4 = $x$ - 4

Second: Since we know what the first term is, we need to find out what the second term is and the inequality sign.

This step is quite easy. Let's tackle the inequality sign first:

A number decreased by 4 is less than 14

The only words that would describe an inequality sign are the words: 'less than'. The less than sign looks like this: <

Fourteen [just like four] is just a number so we don't need to change that

So our final product is this: $x$ - 4 < 14

Thank you for reading.

Topic: Inequalities

6 0

3 years ago

In 11 years, John's age will be 5 less than 5 times his current age. How old is he? If x represents John's current age, which of

seropon [69]

Answer:

Step-by-step explanation:

Let John's age be x. This gives us that in 11 years, john's age will be 5 less than 5 times his current age. Therefore, we could get: $x+11=5x-5$ . This is your second equation. Solving for x, we get 4x=16 so x=4.

5 0

3 years ago

Read 2 more answers