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Citrus2011 [14]
2 years ago
13

Plz help

Mathematics
1 answer:
jeka942 years ago
3 0

Answer:

30 miles per hour downstream

20 miles per hour upstream

Step-by-step explanation:

divide 4 by 120 to get the rate downstream

divide 6 by 120 to get the rate upstream

Hope this helps :(

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Just the 3rd and 4th plz help me
Mademuasel [1]

Answer:

3. 122.025

4. 469.2

Step-by-step explanation:

16.27/2 =8.135

8.135*15= 122.025


11.73 divided by 1/2= 23.46

23.46*20=469.2

6 0
3 years ago
1 For each line
Elena-2011 [213]

Step-by-step explanation:

I'll do line A for you and you can use the formulas to solve lines B and C yourself, since its good for you to practice doing these questions yourself

a)

The gradient, m, is calculated using m = (y2-y1)/(x2-x1) where x1,x2,y1 and y2 can be any ordered pairs on the line.  I'm going to use (4,0) and (7,3) as the 2 points.

m = (3-0)/(7-4) = 3/3 = 1

b)

The y-intercept is where the line intersects with the x-axis. In this case (0,-4)

c)

The equation of a linear line is y=mx+b (or c depending on which country you are from)

y = 1x-4

y=x-4

Now try the other 2 lines yourself!

If this answer has helped you, considered making this the brainliest answer!

5 0
2 years ago
Please hurry and tell me the answer.
vaieri [72.5K]

Answer:

A is correct

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Terry deposits $200 into a bank account that earns 3% simple interest per year. What is the total amount in the account after 2
MrRa [10]
Well first you have to solve for the 1st year so 200*.03, .03 represents the 3%. Which would equal 6 dollars so after the 1st year he would have 200+6=206.

Now you do the second year so do 206*.03, which would equal 6.18 so 206+6.18=212.18

Answer= 212.18
5 0
3 years ago
When are conclusions said to be​ statistically significant?
mars1129 [50]

Answer:

If the p-value is less than a given significance level, you reject the null hypothesis and accept the alternative hypothesis.

Step-by-step explanation:

Suppose you have a business in which you'd like to make a change to increase your business. After making the change, you can use a significance test it. To conduct a significance test, you make a null hypothesis which states essentially that no effect happened. You also make an alternative hypothesis that states the change had an effect. You then test the two to see which one stands. In a significance test, using the p-value from your sample you compare it to the null and alternative hypotheses. You make a conclusion when:

  • If the p-value is less than a given significance level, you reject the null hypothesis and accept the alternative hypothesis since the evidence is in favor of it.

If the p-value is greater than the significance level, then you fail to reject the null hypothesis and cannot conclude. There isn't evidence in favor of the alternative hypothesis.

8 0
2 years ago
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