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DedPeter [7]
3 years ago
5

If 3 times a certain number is increased by 4 the result is 28 what is the number

Mathematics
2 answers:
Vera_Pavlovna [14]3 years ago
7 0
3x+4=28
-4 -4
3x=24
/3 /3
x=8
EastWind [94]3 years ago
3 0

Answer: The number is 8

Step-by-step explanation:

 Let be "x" the certain number. Then "3 times a certain number" means that the number "x" is multiplied by 3. This is:

(3)(x)=3x

Now, "3 times a certain number is increased by 4" means that the we must add 4 to 3x, in other words, this indicate an addition:

 3x+4

And finally "3 times a certain number is increased by 4 the result is 28" means that  3x+4 is equal to 28. Then the expression is:

 3x+4=28

To find the number "x", subtract 4 from both sides of the equation:

3x+4-4=28-4

3x=24

Dividing both sides of the equation by 3, you get that the number is:

\frac{3x}{3}=\frac{24}{3}\\\\x=8

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a share of stock in the bree medical supply company is quoted at 35 1/4. suppose you hold 20 shares of that stock, which you bou
erica [24]
Total number of stocks bought = 20
Rate at which each stocks were bought = 31 1/2
                                                             = 63/2
Rate at which 20 stocks were bought = 20 * (63/2) dollars
                                                             = 10 * 63 dollars
                                                             = 630 dollars
Rate at which each stocks were sold = 35 1/4
                                                             = 141/4 dollars
Rate at which 20 stocks were sold = 20 * (141/4) dollars
                                                         = 5 * 141 dollars
                                                         = 705 dollars
Then
Amount of profit made by selling 20 stocks = (705 - 630) dollars
                                                                      = 75 dollars
So the total amount of profit made is $75. The correct option in regards to the given question is option "D".
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3 years ago
Systems of equations by substitution
Korolek [52]
Could you please clarify the question please by putting a question to be solved? Or are you asking for the definition?
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3 years ago
A rectangular prism has a surface area of 8 square feet. A similar rectangular prism has a surface area of 200 square feet. How
natita [175]

It would be 25 how I got that answer was I did 200 ÷ 8 and that gave me 25

7 0
3 years ago
Read 2 more answers
the ratio of peters money to henrys money is 4 : 3 there at first. after perter spent 12 dollars they had an equal amount of mon
MatroZZZ [7]

Using a system of equations, it is found that Peter had $48 at first.

<h3>What is a system of equations?</h3>

A system of equations is when two or more variables are related, and equations are built to find the values of each variable.

In this problem, the variables are:

  • Variable x: Peter's money.
  • Variable y: Henry's money.

The ratio of peters money to henrys money is 4 : 3, hence:

\frac{x}{y} = \frac{4}{3}

After Peter spent $12, they had the same amount, hence:

y = x - 12.

Then, replacing in the ratio:

\frac{x}{y} = \frac{4}{3}

\frac{x}{x - 12} = \frac{4}{3}

4(x - 12) = 3x

x = 48.

More can be learned about a system of equations at brainly.com/question/24342899

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4 0
2 years ago
9.5 is what percent of 500?
natta225 [31]
9.5% of 500 = 47.5

9.5% × 500 =

(9.5 ÷ 100) × 500 =

(9.5 × 500) ÷ 100 =

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47.5;
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