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Mademuasel [1]
3 years ago
7

Two less than 2 times a number is the same as the number plus 64. What is the number?

Mathematics
2 answers:
hammer [34]3 years ago
5 0

Let n be the number unknown


2(n)-2=n+64


Use distribute property to remove parenthesis

2n-2=n+64


Move all n term to left side


2n-n-2=64


Combine like terms with n


N-2=64


Now add integer to right side by doing opposite sign


N = 64+2


Solve for n


N=66


Your number is 66


To check you substitute


2(66)-2=66+64

130. =130


sineoko [7]3 years ago
4 0

What is 3 times the number?

3*66 = 198

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Answer:

The y-value is -20

Step-by-step explanation:

So let's solve this by Elimination method;

-2(4x + 5y = -12)

4(2x + 3y = -16)

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8x + 12y = -64

So x cancels out because -8 + 8 = 0

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Divide both sides by 2;

y = -20

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8 0
3 years ago
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vlada-n [284]
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3 0
3 years ago
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8 0
3 years ago
Read 2 more answers
The population of two different villages is modeled by the equations shown
vlada-n [284]

Answer:

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Year = 2015 and population = 715

Step-by-step explanation:

It is given that the population of two different villages is modeled by the given equations:

y=x^2-30x+540

y=20x+15

The population of both villages are same after x years after 1980 if

x^2-30x+540=20x+15

x^2-30x+540-20x-15=0

x^2-50x+525=0

Splitting the middle term, we get

x^2-15x-35x+525=0

x(x-15)-35(x-15)=0

(x-15)(x-35)=0

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It means, after 15 or 35 years, the population will same.

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For x=35, years is 1980+35=2015 and population is  

y=20(35)+15=715.

Therefore, population are equation in Year = 1995 and population = 315 or Year = 2015 and population = 715.

7 0
3 years ago
If A = 3r^2h^2, and (rh) increases by 100%, then the new A is how many times greater than the old A? PLEASE HELP ME!!! (Specify
Maslowich

Answer: the answer is 3

Step-by-step explanation:

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3 0
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