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Orlov [11]
3 years ago
8

the product of 7 and a number increased by 3 is equal to twice the number subtracted from 39 find the number

Mathematics
2 answers:
Vanyuwa [196]3 years ago
4 0
Say x is the number

7x +3 = 39 -2x
Add 2x to each side
9x +3 =39
Subtract 3 from each side 
9x =36
Divide by 9 on each side
x=4

Hope this helped
Neporo4naja [7]3 years ago
4 0

Answer:  The required number is 2.

Step-by-step explanation:  Given that the product of 7 and a number increased by 3 is equal to twice the number subtracted from 39.

We are to find the number.

Let x represents the given number.

Then, according to the given information, we have

7(x+3)=39-2x\\\\\Rightarrow 7x+21=39-2x\\\\\Rightarrow 7x+2x=39-21\\\\\Rightarrow 9x=18\\\\\Rightarrow x=\dfrac{18}{9}\\\\\Rightarrow x=2.

Thus, the required number is 2.

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Which operation would you do second in the following problem?
sleet_krkn [62]

Answer:

C. Multiplication

Step-by-Step Explanation:

This problem is testing your knowledge of the Order of Operations. Here is the correct order:

Exponents (inside parenthesis)- There are no exponents for you to solve in this expression, so just ignore this step for now. (example: (4 + 2²) --> (4 + 4))

Parenthesis (from left to right)- In this case, you would solve the expressions inside the parenthesis <em>first</em> because there are no exponents.

Multiplication and Division (from left to right outside of parenthesis)- After solving the expressions inside the parenthesis, there will be one multiplication you need to solve next.

Addition and Subtraction (from left to right outside of parenthesis)- The only operation left for you to do now is addition. You can either do this in one whole step, or you can divide it into two steps. I've done it in two to keep it simple.

Here is the problem worked out in steps in case you are confused:

Step 1: Parenthesis

(-8 ÷ 4) + 5 + 4(3 - 6)

(-2) + 5 + 4(-3)

Step 2: Multiplication

-2 + 5 + 4(-3)

-2 + 5 + (-12)

Step 3: Addition

-2 + 5 + (-12)

3 + (-12)

-9

(Note: '3 + (-12)' could also be written as '3 - 12', making it a subtraction instead of an addition)

Hope this helps!

5 0
3 years ago
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Mr.Henderson did not realize his checking account had a balance of $200 when he used his debit card for a $317.25 purchase. What
gulaghasi [49]

Answer:

His account balance would be -$117.25

Step-by-step explanation:

His purchase exceeded the amount of money in his checking account balance. He is now in the negative numbers.

6 0
3 years ago
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What does the equation 7(3x - 4) equal?
Elanso [62]
This will equal 21x - 28

6 0
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Christopher spent 2hours doing his homework. He finished at 5:30 p.m. what time did he start his homework
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He finished at 3:30 pm.
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Ricardo comes up with his own casino game.You draw a card from a standard deck.If you pick a heart, you win $10.If you pick a fa
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Answer:

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P(Diamond)=13/52  =1/4

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Since after drawing card is not replaced

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now if second card is not Diamond.then

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Your friend has got better chance to win because there are more chances that both the cards are not Diamonds.

5 0
3 years ago
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