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Mila [183]
3 years ago
11

How to write the expression in standard form 4(2a)+7(-4b)+(3×c×5

Mathematics
1 answer:
Alex787 [66]3 years ago
8 0

Answer:

8a + -28b + 15 x c  

Step-by-step explanation:

PogChamp

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Let x = 6. What is the value of the expression 5x to the 2nd power +x−7 ?
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149

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5 to the second power is 25, because you do 5x5. Then you multiply 25 by x, which is 6, and get 150. Then you add 6 to 150, which is 156, and subtract seven. Also the answer is 149.

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Step-by-step explanation:

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on the first four days of the week, Ella took 30 min 28 min 34 min and 31 min to get to school if the average for the week is 31
Mila [183]

It took 32 minutes for Ella to go to school on Friday.

Step-by-step explanation:

Time for first four days in minutes,

30,28,34,31

Let x be the time on Friday

Average = 31 min

As we know

Average = \frac{Sum\ of\ term}{No.\ of\ terms}\\Average=\frac{30+28+34+31+x}{5}\\31=\frac{123+x}{5}

Multiplying both sides by 5;

5*31=\frac{123+x}{5}*5\\155=123+x\\x+123=155\\x=155-123\\x=32

It took 32 minutes for Ella to go to school on Friday.

Keywords: Average, Addition

Learn more about addition at:

  • brainly.com/question/4459688
  • brainly.com/question/4460262

#LearnwithBrainly

5 0
4 years ago
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