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2 years ago

Write in expanded form 72.864

Mathematics

1 answer:

Sergeeva-Olga [200]2 years ago

5 0

Answer:

70 + 5 + 8/10 + 6/100 + 4/1000

7*10 + 5*1 + 8*1/10 + 6*1/100 + 4*1/1000

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Someone can help me with this please

Marina CMI [18]

Answer:

x = -1 and x = 7

Step-by-step explanation:

2x^2 + 2x - 14x - 14

2x^2 - 12x -14

Divide through by 2 to simplify the expression

x^2 - 6x - 7

x^2 - 6x -7

Now, let's think of two numbers that when added up gives -6 and when multiplied gives -7

Yes! It's -7 and +1

-7 + 1 = -6 , and -7* 1 = -7

Now, lets substitute these numbers in the expression

x^2 -7x + x - 7

factorize

x(x - 7) + 1(x - 7)

(x + 1) (x - 7)

Now equate to zero

(x + 1) (x - 7) = 0

x + 1 = 0

subtract 1 from both sides

x +1 - 1 = 0 -1

x = -1

Also,

x - 7 = 0

Add 7 to both sides

x -7 + 7 = 0 + 7

x = 7

Hence, x = -1 and x =7

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3 years ago

Use the magnitudes (Richter scale) of the 120 earthquakes listed in the accompanying data table. Use technology to find the ra

Bas_tet [7]

Answer:

2.90

Step-by-step explanation:

im not completly shous though

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2 years ago

If 5|x − 1| = 20, then x = 1 or 5 6 or –8 –2 or 4 5 or –3 Please help

anygoal [31]

Answer:

Step-by-step explanation:

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3 years ago

PLEASE ANSWER THIS!! 16 POINTS! (2/3)*2 + 1/2

alexira [117]

Answer:

=7/6

Step-by-step explanation:

Join 4/3=1:7/3

7/3/2

Apply the fraction rule:=

7/3x2

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7/6

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3 years ago

Read 2 more answers

A laptop company claims up to 11.0 hours of wireless web usage for its newest laptop battery life. However, reviews on this lapt

emmainna [20.7K]

Answer:

Step-by-step explanation:

given that a laptop company claims up to 11.0 hours of wireless web usage for its newest laptop battery life. However, reviews on this laptop shows many complaints about low battery life. A survey on battery life reported by customers shows that it follows a normal distribution with mean 10.5 hours and standard deviation 27 minutes.

convert into same units into hours.

X is N(10.5, 0.45)

a) the probability that the battery life is at least 11.0 hours

$P(X\geq 11)\\\\=1-0.8667\\=0.1333$

(b) the probability that the battery life is less than 10.0 hours

= $P(X$

=97th percentile

= 11.844

d) The time of use that is exceeded with probability 0.9 is

is 90th percentile = 10.885

8 0

3 years ago