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3 years ago

If 9 is subtracted from a certain number and the difference is divided by 3, the result is 1 more than

Mathematics

1 answer:

Butoxors [25]3 years ago

4 0

Answer:

Let the number be x.

(x-9)/3= (x/7)+1

(x-9)/3= (x+7)/7

Cross multiplying

7x-63= 3x+21

4x= 84

x= 42

Hope this will help :-)

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What are the solutions of the equation x^4-9x^2+8=0? Use u substitution to solve.

vodka [1.7K]

Answer:

The answer is the second option

Step-by-step explanation:

Let u=x^2.

$( {x}^{2} ) {}^{2} - 9( {x}^{2} ) + 8( {x}^{2} ) {}^{0}$

${u}^{2} - 9u + 8$

$(u - 1)(u - 8)$

$u = 1$

$u = 8$

Set this equal to x^2

${x}^{2} = 1$

$x = 1$

$x = - 1$

${x}^{2} = 8$

$x = 2 \sqrt{2}$

$x = - 2 \sqrt{2}$

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1 year ago

You are paid $82.50 for 71212 hours of work. What is your rate of pay?

yanalaym [24]

If you would like to know what is your rate of pay, you can calculate this using the following steps:

$82.50 ... 7.5 hours
$x = ? ... 1 hour

82.50 * 1 = 7.5 * x
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x = 82.50 / 7.5
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The correct result would be $11 per hour.

3 0

3 years ago

Help me please! will mark brainliest if ur correct!

Zina [86]

Answer:

i think it's c

Step-by-step explanation:

ok so i think i get it, volume is width*length*depth so dividing the known volume by its width gives you the length*depth.

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2 years ago

How much would a school save by using Company B instead of Company A to serve 200 students?

natita [175]

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7 0

3 years ago

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The sample space listing the eight simple events that are possible when a couple has three children is {bbb, bbg, bgb, bgg, g

maria [59]

Answer:

The probability of four girls is:

$\dfrac{1}{16}$

Step-by-step explanation:

The sample space for 4 children consist of 16 entries and is given by:

{bbbb,bbbg,bbgb,bgbb,gbbb,bbgg,bgbg,ggbb,gbbg,gggg,gggb,ggbg,gbgg,bggg,gbgb,bggb}

i.e. The total number of outcomes=16.

Now the number of outcomes of getting four girls or we can say no boys=1=Number of favourable outcomes {i.e. the outcome is gggg}

Hence,

The probability of getting four girls= (Number of favourable outcomes)/(Total number of outcomes)=1/16

Hence, the probability of four girls is: $\dfrac{1}{16}$

7 0

2 years ago

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