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mr Goodwill [35]
3 years ago
13

Red lights flash every 6 seconds. Blue lights flash every 8 seconds. The store owner turns on the lights. After how many seconds

will the lights flash at the same time for the first time
Mathematics
1 answer:
Morgarella [4.7K]3 years ago
8 0
In 24 seconds they will flash at the same time for the first time
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Please help please really need help please
just olya [345]

Answer:

x = 1

y = -2

Step-by-step explanation:

5x - 2y = 9 -----------(I)

2x + 7y = -12 --------------(II)

Multiply (I) by 7          35x - 14y = 63

Multiply (II) by 2         <u>4x + 14y  = - 24</u><u>  </u> {Now add and thus y will be eliminated}

                                  39x         =      39

                                          x = 39/39

x = 1

Plugin x = 1 in equation(I)

5*1 - 2y = 9

5 -2y = 9

    -2y = 9 -5

    -2y = 4

        y = 4/-2

        y = -2

8 0
3 years ago
Assume that the readings on the thermometers are normally distributed with a mean of 0 degrees0° and standard deviation of 1.00d
Alex

Answer:

The diagram is attached below.

Step-by-step explanation:

A normal distribution mean 0 and standard deviation 1 is known as the standard normal distribution.

So, the readings on the thermometers (denoted by <em>Z</em>) follows N (0, 1).

It is provided that 2.7​% of the thermometers are rejected because they have readings that are too high and 2.7​% are rejected because they have readings that are too low.

This implies that:

P(Zz)=0.027

The value of <em>z</em> associated to both these probabilities are:

<em>z</em> = 1.93.

That is,

P(Z1.93)=0.027

*Use a <em>z</em>-table.

The diagram for the two readings that are cutoff values separating the rejected thermometers from the others is attached below.

6 0
4 years ago
If polygon ABCD is moved right 3 and up 2, what would the new coordinates of vertex D?
Mnenie [13.5K]
B (1,0). -2 + 3 = 1. -2 + 2 = 0.
8 0
3 years ago
Which of these two numbers is the largest?<br> 4.12 or 4.21<br><br> What’s the answer?
hjlf

Answer:

4.21

Step-by-step explanation:

12 is less than 21 therefore its bigger

6 0
3 years ago
HEY. HEY. OVER HERE. help please? ill GREATLY appreciate it
kondaur [170]
Hey use the photomash
7 0
2 years ago
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