Explain how to write 2 dividid 5 as a fraction


Answer 1



Step-by-step explanation:

Two divided by 5 is simply written as 2/5.

Hope I helped!

Answer 2
Answer: 2/5 is how it’s written as a fraction, 2 is over 5, 2 goes inside and 5 outside when you write the division expression

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The temperature, H, in °F, of a cup of coffee t hours after it is set out to cool is given by the following equation. H = 70 + 120(1/4)t (a) What is the coffee's temperature initially (that is, at time t = 0)? 190 °F What is the coffee's temperature after 1 hour? 100 °F What is the coffee's temperature after 2 hours? (Round your answer to one decimal place.) 2 °F (b) How long does it take the coffee to cool down to 85°F? (Round your answer to three decimal places.) 5 hr How long does it take the coffee to cool down to 75°F? (Round your answer to three decimal places.) 5 hr
Can answer this 1/2 + 2/5=​

All possible random samples of 200 middle managers are selected from a population for a study concerning their mean annual income. The population standard deviation is computed to be $2,248.5. What is the standard deviation of the sampling distribution of the means?




Step-by-step explanation:

We have to find the standard deviation of the sampling distribution of the means.

We are given that population standard deviation=σ=2248.5 and sample size=n=200.

Standard deviation of sampling distribution of  means=σxbar=σ/√n




Thus, the standard deviation of the sampling distribution of the means is $158.993.

1, 3, 7, 9 whats next ?


Maybe 13... because it goes +2 then +4 then +2 so next it would be +4

11? We need more of an explanation to understand your question.

During an experiment, Aika measured the time it took for a ball to roll down a ramp set at an angle. She measured that it took 1.010 seconds. The exact time it should take based on calculations is 0.904 seconds. What was her experimental error?




Step-by-step explanation:

Given that :

True value = 0.904 seconds

Measured time = 1.010 seconds

Experimental error :

(|measured value - True value | / true value) * 100%

(|1.010 - 0.904| ÷ 0.904) * 100%

= 0.106 / 0.904 * 100%

= 0.1172566 * 100%

= 11.725%



Step-by-step explanation:

Could someone help me out with this.



45 units

Step-by-step explanation:

Since both figures are similar, the ratio of their similar sides will be equal to a constant. Hence;

8/10 = 12/EH

8EH = 12 * 10

8EH = 120

EH = 120/8

EH = 15

Perimeter of EFGH = 15 + 10 + 5 + 15 = 45 units

Use algebra to solve 3x+4 = 1/x
The exact solutions are x=



Ignore the A before the ±, it wouldn't let me type it correctly.

x=(2±√(7)  )/(3)

Step-by-step explanation:

3x + 4 = 1 ÷ x

3x + 4 - 4 = 1 ÷ x - 4

3x = 1 ÷ x - 4

3x=(1)/(x) +(x(-4))/(x)




x · 3x = - 4x + 1

3x² = - 4x + 1

3x² - (- 4x + 1) = 0

3x² + 4x - 1 = 0

Ignore the A before the ±, it wouldn't let me type it correctly.

x=\frac{-b±\sqrt{b^(2)-4ac } }{2a}

a = 3

b = 4

c = - 1

x=\frac{-4±\sqrt{4^(2)-4((3)(-1)) } }{2(3)}

x=(-4±√(16-4((3)(-1)) ) )/(2(3))

x=(-4±√(16+12 ) )/(2(3))

x=(-4±√(28 ) )/(2(3))

x=(-4±√((2)(14) ) )/(2(3))

x=(-4±√((2)(2)(7) ) )/(2(3))

x=(-4±√(2 ) √(2)√(7)  )/(2(3))

x=(-4±2√(7)  )/(2(3))

x=(-4±2√(7)  )/(6)

Two separate equations

x=(-4+2√(7)  )/(6)

x=(2+√(7)  )/(3)

x=(-4-2√(7)  )/(6)

x=(2-√(7)  )/(3)

People who eat lots of fruits and vegetables have lower rates of colon cancer than those who eat little of these foods. Fruits and vegetables are rich in "antioxidants" such as vitamins A, C, and E. Will taking antioxidants help prevent colon cancer? A medical experiment studied this question with 864 people who were at risk of colon cancer. The subjects were divided into four groups: daily beta-carotene, daily vitamins C and E, all three vitamins every day, or daily placebo. After four years, the researchers were surprised to find no significant difference in colon cancer among the groups(a) What are the explanatory and response variables in this experiment?(b) Outline the design of the experiment. Use your judgment in choosing the group sizes.(c) The study was double-blind. What does this mean?(d) What does "no significant difference" mean in describing the outcome of the study?(e) Suggest some lurking variables that could explain why people who eat lots of fruits and vegetables have lower rates of colon cancer. The experiment suggests that these variables, rather than the antioxidants, may be responsible for the observed benefits of fruits and vegetables.



Step-by-step explanation:

(a). The explanatory variables are the antioxidant group, the response variable is the result of the rate of colon cancer

(b)The design of the experiment is stratified Random sampling. I'll suggest there divided into equal group of 216 each.

(c). Double blind is when the people subjected to the experiment are not in the know if they're given placebo or the real antioxidant

(d) No significant difference mean, there is no convincing relationship that those that engage in using antioxidant have reduced colon cancer rate.

(e) Awareness of its history in family, age also.