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lutik1710 [3]
3 years ago
15

One ­fifth of Bill's age is 4 years. Find Bill's age.

Mathematics
1 answer:
dimulka [17.4K]3 years ago
7 0
The answer is A). 5*4=20 one fifth is 4.
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PLEASE HELP! 15 POINTS Order the expressions from greatest to least coefficient of x. Place the expression with the greatest coe
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I need help on this one
shusha [124]

Answer:

= 1/26

Step-by-step explanation:

Use Division Distributive Property:

(x/y)^a = x^a/y^a

(^, That means to the power of exponents.)

Then you Simplify  6^3 to 216

Then you will get 1 over 216.

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At his regular hourly rate, Don had estimated the labor cost of a repair job as $336 and he was paid that amount. However, the j
Naddika [18.5K]

Answer:

The time Don estimated for the job, in hour, is 24 hours

Step-by-step explanation:

Based on his regular hourly rate, Don had estimated :

Estimated cost (C) = $336

Estimated hour of work =x

So, estimated rate in hour (R) = \frac{336}{x}

In fact, it took him 4 hours longer than he estimated, therefore

Factual hour of work = {x+4}

Factual rate in hour (F) = \frac{336}{x+4}

He earned $2 less than his regular hourly rate, hence the factual rate (F) is the subtraction of estimated rate (R) by 2

F = R - 2

Then, substitute F and R,

\frac{336}{x+4} = \frac{336}{x} - 2

\frac{336}{x+4}+2  = \frac{336}{x}

x(\frac{336}{x+4}+ \frac{2(x+4)}{x+4}) = 336

x(336+2(x+4))  = 336 (x+4)

336x+2x^{2} +8x = 336x+336*4

since at the both sides have 336x, we can removed it.

2x^{2} + 8x = 336 * 4

devide both sides by 2, thus

x^{2} +4x = 336 * 2

x^{2} +4x = 672

Make the algebra function equal to 0 by moving the 672 to the left side.

x^{2} +4x - 672 = 0

factorize the function above,

the factor of 672 is 24 and 28, because if it's multiplied it becomes 672 and if it's subtracted equal to 4. since 4x is positive, the higher number (28) should be in positive. Therefore we conclude that

(x+28)(x-24) = 0

x+28=0, x = -28\\x-24=0, x = 24

We takes the positive result, because the time is in positive. so, the estimated time is 24 hours

3 0
3 years ago
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