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andrezito [222]
3 years ago
12

1/9 divided by 5/4 equals?

Mathematics
1 answer:
Fed [463]3 years ago
7 0

Answer:

the answer is 7.2

Step-by-step explanation:

because 1 times 9 divided by 5 times 4 = 7.2 on the calculator

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2x4x5c+9? 6x5 6.5 8x9
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3 years ago
A computer manufacturer estimates that its cheapest screens will last less than 2.8 years. A random sample of 61 of these screen
masya89 [10]

Answer:

The test is left - tailed

We cannot reject the organization's claim ( its cheapest screens will truly last less than 2.8 years)

Step-by-step explanation:

Sample size, n = 61

Sample mean, \bar{X} = 2.4

Standard deviation, \sigma = 0.88

Significance level,  α=0.02

Null hypothesis, H_{o} : \mu = 2.8

Alternative hypothesis, H_{a} : \mu < 2.8

It is clearly seen from the alternative hypothesis, that it is a left tailed test. It is not tailed towards the two directions.

Calculate the test statistic:

Z = \frac{\bar{X} - \mu}{\sigma/\sqrt{n} } \\Z = \frac{2.4 - 2.8}{0.88/\sqrt{61} }\\Z = - 3.55

Calculate the P-value:

P(Z < -3.35) = 0.0002

Since (p-value = 0.0002) < (α=0.02), the null hypothesis is rejected.

It can therefore be concluded that the mean of the cheapest screen is less than 2.8 years. i.e. the cheapest screen will last less than 2.8 years

6 0
3 years ago
Read 2 more answers
Mr. Richardson is driving to a town 85 miles away. He drives 35 miles per hour for 2 hours before stopping for lunch. He drives
Vlad [161]

Answer:

  (a)  85 - (35 x 2) - 6

Step-by-step explanation:

The miles Mr. Richardson has left to drive will be the difference between the distance to his goal and the miles he has alread driven. The relation between distance, speed, and time can be used to find the miles he drove before lunch.

__

<h3>before lunch</h3>

  distance = speed × time

  miles before lunch = (35 mi/h) × (2 h) = (35 × 2) mi

<h3>total driven</h3>

The total miles driven before stopping for gas will be ...

  miles before stopping for gas = (miles before lunch) + (6 more miles)

  = 35 ×2 +6 . . . miles

<h3>miles remaining</h3>

Then the remaining miles are ...

  remaining = trip miles - miles driven

  = 85 -(35 ×2 +6)

  = 85 - (35 ×2) -6 . . . . . miles left to drive

4 0
2 years ago
Which fraction is equivalent to
weqwewe [10]

Answer:

3/-2

Step-by-step explanation:

8 0
3 years ago
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PLS HELP ASAP‼️‼️ i need pleaseeeeeee
-Dominant- [34]

Answer:

-2x^4 - 6x^3 - 8x^2

Step-by-step explanation:

4 0
3 years ago
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