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horsena [70]
3 years ago
8

Can someone perz help

Mathematics
2 answers:
a_sh-v [17]3 years ago
8 0

Answer:

2/1

Step-by-step explanation:

If it's heads 20 times then it's tails 10 times since the coin is flipped 30 times in total

The ratio of heads to tails is 20/10➡2/1

storchak [24]3 years ago
7 0
A is the correct answer cause you get heads twice as often as tails
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Combine like terms and note the degree<br> 8a^6bc-abc-8a^6bc
erik [133]

Answer:-abc

Step-by-step explanation:

To collect like terms of

8a^6bc-abc-8a^6bc

=8a^6bc-8a^6bc-abc

=-abc

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3 years ago
Marissa and Jarod plan to purchase DVD players with a regular price of $199.99. The DVD players are on sale for 25% off. Marissa
sergeinik [125]
<span>Marissa and Jarod plan to purchase DVD players with a regular price of $199.99. The DVD players are on sale for 25% off.
=> Marissa starts by calculating 25% of $199.99.
25% of 199.99 dollars
25% = 0.25
199.99 * .25 = 49.99 dollars
=> Jarod calculates 75% of $199.99.
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3 0
3 years ago
Motorola used the normal distribution to determine the probability of defects and the number
vovangra [49]

Answer:

a.P<x<9.85 orx>10.15)=0.3174, Total defects=317.4

b.p=0.0026,total defects=2.6

c.Less of the items produced will be classified as defects.

Step-by-step explanation:

a.The standard score,z, is esentially x reduced by process mean then divided my process standard deviation.

\mu=10,\sigma=0.15\\Therefore:-\\z=\frac{x-\mu}{\sigma}=\frac{9.85-10}{0.15}\approx-1.0\\z=\frac{x-\mu}{\sigma}=\frac{10.15-10}{0.15}\approx+1.0\\P(x10.15)=P(Z+1.0)\\=2P(Z

Total defects=Production*Probability

                      =0.3174*1000

                       =317.4

b. \mu=10,\sigma=0.05

therefore:-

z=\frac{x-\mu}{\sigma}=\frac{9.85-10}{0.05}\approx-3.0\\z=\frac{x-\mu}{\sigma}=\frac{10.15-10}{0.05}\approx+3.0\\\\=P(x10.15)=P(Z+3.0)\\=2P(Z

Defects=Probability*Production

            =0.0026*1000

             =2.6

c.Reducing process variation results in a significant reduction in the number of unit defects.

3 0
3 years ago
Different shapes are drawn on cards and then the cards are placed in a bag. The number of cards for each shape is shown in the t
Goshia [24]
70% or 91/130.

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6 0
3 years ago
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Nesterboy [21]

Answer:

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hope this helps!

Step-by-step explanation:


3 0
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