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Brilliant_brown [7]
3 years ago
7

Cube with surface area=294 yd^2

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
5 0
SAcube=6side^2

SA=294
294=6side^2
divide both sides by 6
49=side^2
sqrt both sides
7=side

the side length is 7 and volume is 343 cubic yards
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Your cell phone plan charges a base charge each month plus a charge per daytime minute of usage and December used 510 daytime mi
algol13

Answer:

In February, 423 daytime minutes is used

Step-by-step explanation:

Let the base plan charges be x

And cost per daytime minute be y

In December,

x  + 510y =  92.25------------------(1)

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x + 397y = 77.56---------------------(2)

Subtracting eq(2) from eq(1)

x  + 510y =  92.25

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-------------------------------

0  + 113y = 14.69

-------------------------------

y = \frac{14.69}{113}

y =  0.13----------------------------------(3)

Substituting (3) in (1)

x  + 510(0.13) =  92.25

x + 66.3 = 92.25

x = 92.25 - 66.3

x = 25.95

So In February

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25.95 + (daytime minute)(0.13) = 80.9

(daytime minute)(0.13) = 80.9 - 25.95

(daytime minute)(0.13) = 54.95

(daytime minute) =\frac{54.95}{0.13}

daytime minutes = 422.69

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Step-by-step explanation:

Step-by-step explanation:

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