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vredina [299]
3 years ago
10

What is (20+7) x 9+4

Mathematics
2 answers:
max2010maxim [7]3 years ago
8 0

Answer:

247

Step-by-step explanation:

(20 + 7) x 9 + 4

(27) x 9 + 4

243 + 4 = 247

Thus, (20+7) x 9+4 = 247

<u>-TheUnknown</u><u>S</u><u>cientist</u>

zvonat [6]3 years ago
7 0
<h2>Answer:</h2>

<em><u>solution</u></em><em><u>,</u></em><em><u> </u></em>

<em><u>(</u></em><em><u>2</u></em><em><u>0</u></em><em><u>+</u></em><em><u>7</u></em><em><u>)</u></em><em><u>×</u></em><em><u>9</u></em><em><u>+</u></em><em><u>4</u></em>

<em><u>2</u></em><em><u>7</u></em><em><u>×</u></em><em><u>9</u></em><em><u>+</u></em><em><u>4</u></em>

<em><u>2</u></em><em><u>4</u></em><em><u>3</u></em><em><u>+</u></em><em><u>4</u></em>

<em><u>2</u></em><em><u>4</u></em><em><u>7</u></em>

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Tcecarenko [31]

Answer:

C. $97

Step-by-step explanation:

The average of his wage for all 15 days is the sum of all wages for the 15 days divided by 15.

average wage for 15 days = (sum of wages for the 15 days)/15

The amount of wages during a number of days is the product of the average wage of those days and the number of days.

First 7 days:

average wage: $87

number of days: 7

total wages in first 7 days = 7 * $87/day = $609

Last 7 days:

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number of days: 7

total wages in last 7 days = 7 * $92/day = $644

8th day:

wages of the 8th day is unknown, so we let x = wages of the 8th day

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total wages of 15 days = 609 + x + 644 = x + 1253

average wage for 15 days = (sum of wages for the 15 days)/15

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3 0
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B Christian installed an electric pump to pump water from a borehole into a 30 000 litre cement dam. If the water is pumped at a
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Given the amount of water needed to fill the cement dam and the water pump rate, the time needed to fill the dam is 400 minutes or 6hours 40minutes.

Option B)6h 40min is the correct answer.

<h3>How long does it take to fill the dam?</h3>

Given that;

  • Amount of water needed to fill the dam A = 30000 litres
  • Pump rate r = 75 litres per minute
  • Time needed to fill the dam T = ?

To determine how long it take to fill the dam, we say;

Time need = Amount of water needed ÷ Pump rate

T = A ÷ r

T = 30000 litres ÷ 75 litres/minute

T = 400 minutes

Note that; 60min = 1hrs

Hence,

T = 6hours 40minutes

Given the amount of water needed to fill the cement dam and the water pump rate, the time needed to fill the dam is 400 minutes or 6hours 40minutes.

Option B)6h 40min is the correct answer.

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8 0
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natka813 [3]

The correct option is fourth option

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