2 years ago

Four times a number is 84 what is the number

1 answer:

8 0

21 because you can do 84 divided by 21 or you can also do 4 times any number that sounds like it would =84. (Stick with option 1 unless you are super confused)

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A mechanical system has 3 subsystems in series, each has reliabilities 98%, 96% and 94%, respectively. What is the overall relia

Ede4ka [16]

Answer:

The overall reliability of the system is 99.9952%

Step-by-step explanation:

Probability of the system not working:

None working, the first with 2% probability of not working(as it has 98% probability of working), the second with 4% and the third with 6%. So

0.02*0.04*0.06 = 0.000048

Probability of the system working:

1 subtracted by the probability of the systme not working.

1 - 0.000048 = 0.999952

0.999952*100% = 99.9952%

The overall reliability of the system is 99.9952%

4 0

2 years ago

20%of what number is 80?

prisoha [69]

20% times n = 80

.20 n = 80

divide both sides by .2

n = 80/.2

n= 400

Answer: 400

8 0

2 years ago

Read 2 more answers

(-10x^2+2)+(-2x^2+9x+7)

Harlamova29_29 [7]

Answer:

- 12x² + 9x + 9

Step-by-step explanation:

(- 10x² + 2) + (- 2x² + 9x + 7 ) ← remove parenthesis

= - 10x² + 2 - 2x² + 9x + 7 ← collect like terms

= - 12x² + 9x + 9

5 0

2 years ago

A MOVIE THEATRE HAS TWO ROOMS. ROOM A HAS 9 ROWS WITH 18 SEATS IN EACH ROW. ROW B HAS THREE TIMES AS MANY SEATS AS ROOM A. HOW M

Oduvanchick [21]

Pretty sure it’s 162

7 0

2 years ago

What is 1.1 in fraction form?

bonufazy [111]

11/10 is the fraction form of 1.1

6 0

3 years ago