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3 years ago

Brent divided 3 1/5 by a number and got 4 1/2. What number did he divide by? Please Answer

Mathematics

2 answers:

asambeis [7]3 years ago

7 0

Answer:

The number divided by was 32/45

Explanation:

Let the unknown number be x

Then 3 1/5÷x=4 1/2

Write as

16/5÷x=9/2

Suppose we had the common denominator of 10 then we would have:

32/10÷x=45/10

Get rid of the 10: multiply through out by 10 giving:

32÷x=45

⇒32x=45

⇒x=32/45

musickatia [10]3 years ago

4 0

It would be 32/45 i hope this helps

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s2008m [1.1K]

Answer:

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3 years ago

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devlian [24]

Answer:

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Step-by-step explanation:

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3 years ago

Eli attended a concert. The decibel level of the music averaged 110 decibels but varied by 28 decibels from the average. Enter a

musickatia [10]

Answer:

The decibel range is $82\leq d\leq 138$

Step-by-step explanation:

Let

d -----> the decibel level of the music

we know that

The absolute value of the difference of the decibel level of the music and its average, must be less than or equal to 28 decibels

The absolute value that represent this problem is

$\left|d-110\right|\le28$

Solve the absolute value

First solution (positive)

$+(d-110)\le28$

Adds 110 both sides

$d\le28+110$

$d\le138$

Second solution (negative)

$-(d-110)\le28$

Multiply by -1 both sides

$(d-110)\ge-28$

Adds 110 both sides

$d\ge-28+110$

$d\ge82$

therefore

The decibel range is

$82\leq d\leq 138$

8 0

3 years ago