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4 years ago

12

Hello! I need a bit of help with this one! Thanks

1 answer:

natali 33 [55]4 years ago

8 0

So 2/9 of the 3/8 calculators were broken.

2/9 x 3/8 = 1/12 of the calculators were broken.

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Scores are 78,81,83, and 76 what must she earn on the fifth test to earn an average test score of 81

iogann1982 [59]

The average value of a data set is equal to the sum of each entry divided by the number of entries. In this case, we have 5 scores, so we can find set up the following equation where x is the fifth score:

$\dfrac{78+81+83+76+x}{5} = 81$

Now solve for x:

$78 + 81 + 83 + 76 + x = 81(5)$

$318 + x = 405$

$x = 87$

The fifth score must be 87.

6 0

3 years ago

Read 2 more answers

Cuál es el resultado de la siguiente adicion?<br>3/4 + (- 2/5) +(6/3) =

SCORPION-xisa [38]

Answer:47/20 or 2.35 in decimal form

Step-by-step explanation:

7 0

3 years ago

You purchase 4 large pizzas for lunch on the beach.Each one cost 9.50$. How much do u spend on pizza

MakcuM [25]

Answer:

$38.00

Step-by-step explanation:

You purchase 4 large pizzas.

Each one costs $9.50

Total expenditure on pizza = $9.50 × 4 = $38.00

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3 years ago

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Three positive integers have a mean of 5 and a range of 10.

Setler [38]

Answer:

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3 years ago

A carpenter is assigned the job of expanding a rectangular deck where the width is one-fourth the length. the length of the deck

anzhelika [568]

Alright, lets get started.

Suppose the original deck size: width = x feet

the width is one-fourth the length given in question means length = 4 x feet

Means the originally area = $x * 4 x = 4 x^{2}$

Now the dimensions are changed.

New dimensions, width = (x + 6)

new length = (4x+10)

So, new area will be = $(x+6) * (4x+10) = 4x^{2} + 10 x + 24 x + 60 = 4x^{2} + 34 x + 60$

the area of the new rectangular deck is 128 ft2 larger than the area of the original deck, means

$4x^{2} + 128= 4x^{2} + 34 x + 60$

Subtracting $4x^{2}$ from both sides

$128 = 34 x + 60$

Subtracting 60 from both sides

$128 - 60 = 34 x + 60 - 60$

$68 = 34 x$

Dividing 34 in both sides

$\frac{68}{34} = \frac{34 x }{34}$

$x = 2$

Means width = 2 feet

Length would be = 4 time width = 4 * 2 = 8 feet

Means dimension of original deck would be = 2 feet and 8 feet :Answer

Hope it will help :)

8 0

4 years ago