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Genrish500 [490]
4 years ago
10

for the expression n(2n+4n^2-5-3n), use the distributive property to write an equivalent expression in standard form

Mathematics
1 answer:
Ronch [10]4 years ago
4 0

\text{distributive property:}\ a(b+c)=ab+ac\\\\2n+4n^2-5-3n=4n^2+(2n-3n)-5=4n^2-n-5\\\\n(2n+4n^2-5-3n)=n(4n^2-n-5)=(n)(4n^2)+(n)(-n)+(n)(-5)\\\\=\boxed{4n^3-n^2-5n}

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a father is 25 years older than his son.Five years ago he was 6 time old as his son was find their presents
IceJOKER [234]

Answer:

the present age of the father be x and the present age of the son be y.

It is given that man is 24 years older than his son that is:

x=y+24

x−y=24..........(1)

Also, 12 years ago, he was five times as old as his son that is:

(x−12)=5(y−12)

x−12=5y−60

x−5y=−60+12

x−5y=−48..........(2)

Now subtract equation 1 from equation 2 to eliminate x, because the coefficients of x are same. So, we get

(x−x)+(−5y+y)=−24−48

i.e. −4y=−72

i.e. y=18

Substituting this value of y in (1), we get

x−18=24

i.e. x=24+18=42

Hence, the present age of the father is 42 years and the present age of the son is 18 years.

Step-by-step explanation:

5 0
3 years ago
On a recent road trip, Mr. Yost drove 210 miles in 3 1/2 hours. Find both the miles driven per hour and the hours driven per mil
amid [387]

Miles driven per hour is 60 miles per hour

Hours driven per mile is 0.01667 hours per mile

<em><u>Solution:</u></em>

Given that,

On a recent road trip, Mr. Yost drove 210 miles in 3 1/2 hours

Therefore,

Miles driven = 210 miles

Time\ taken = 3\frac{1}{2}\ hour = \frac{7}{2} = 3.5\ hour

To find: miles driven per hour and the hours driven per mile

<h3><u>Miles driven per hour</u></h3>

\frac{miles}{hour} = \frac{210}{3.5}\\\\\frac{miles}{hour} = 60\ miles\ per\ hour

<h3><u>Hours driven per mile</u></h3>

\frac{hours}{miles} = \frac{3.5}{210}\\\\\frac{hours}{miles} = 0.01667\ hours\ per\ miles

Thus both the miles driven per hour and the hours driven per mile are found

7 0
3 years ago
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Answer:

1/12  0.08%

Step-by-step explanation:

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3 0
4 years ago
2 friends share 7 cookies equally. how many cookies does each friend get
tekilochka [14]

Answer:

3.5

Step-by-step explanation:

2 friends share 7 cookies equally. How many cookies does each friend get?

7 ÷ 2 = 3.5

3 0
3 years ago
Read 2 more answers
What is the total value of<br> these coins? 31
Elena L [17]

Answer:

The first two coins are quarters, and the one on the right is a nickle.

the two quarters [0.25+0.25] is 0.50 cents. Add the nickle [0.5] and you have 0.55 cents!

ex:     0.25+0.25+0.5

             0.50+0.5

                 =0.55 (cents)

Step-by-step explanation:

7 0
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