Explaining How to Compare Water Levels Ericka decided to compare her observation to the average annual trend, which shows the water rising 1.8 mm/year. Remember, she used 6.2 years as her time period. Explain how she would calculate the difference between how much water levels rose on average and how much the water level fell in the part of the river she observed.

Answers

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

Answer:

Answer: She would multiply the rate by the years to find the average rise in water levels, or 1.8 times 6.2 = 11.16. To find the difference between the water levels, she would subtract -13.64 from 11.16.

Step-by-step explanation:

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The picture is the question
It takes Tom 1 hour to lay 30 bricks. He has to lay 180 bricks. Tom starts to lay the bricks at 9 a.m He has half an hour break at 11 a.m He has another half an hour break at 1 p.m What time should Tom finish laying the 180 bricks?
Which decimal is equivalent to 5/6
5x=-y+6; x=1,2,3 step by step please
which property is shown by 0 9 = 9? distributive property commutative property of addition identity property of addition associative property of addition

The number of hours a group of contestants spent preparing for a quiz show are listed below. What is a frequency table that represents the data? 60 25 86 56 45 48 90 75 30 67 90 36 80 15 32 65 61C

Answers

Answer:

Step-by-step explanation:

Given in the number of hours a group of contestants spent preparing for a quiz

The list shows as follows:

60 25 86 56 45 48 90 75 30 67 90 36 80 15 32 65 61

In ascending order this becomes

x 15 25 30 32 36 45 48 56 60 61 65 67 75 80 86 90

F 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2

Thus we have mode =90

All other entries have frequency 1 except 90

60 25 86 56 45 48 90 75 30 67 90 36 80 15 32 65 61

Hours Frequency
0 - 9 0
10-19 15 1
20-29 25 1
30-39 30, 36, 32 3
40-49 45, 48 2
50-59 56 1
60-69 60, 67, 65, 61 4
70-79 75 1
80-89 86, 80 2
90-99 90, 90 2

Translate the product of a counting number and the next highest counting number into an open sentence.

Answers

so lets say you have a number, x

to get to the next counting number, you add one so
x+1 is the next counting number

product means the result of multiplying os

(x)(x+1)=
distribute [a(b+c)=(ab)+(ac)]
(x^2)+(1x)=x^2+x

4 hours and 25 minutes before 2:05am

Answers

4 hours and 25 minutes before 2:95 am would be 9:40pm

Answer:10:20 pm

Step-by-step explanation:

Time is seperated into 2 sets of 12 hours, am and pm; and 24 hours with each being 60 minutes. AM is morning and PM is afternoon.

The question is what time is 4 hours and 25 minutes before 2:05 in the afternoon. This means you subtract.

205 - 425= -220

Then, because it is negative, you change it from am to pm and subtract 220 from 1200=

1200-220=980

9:80 is has too high a number in the minutes section (the second part) so you see how many sets of 60 are in 80. There is one set of 60 meaning there is one hour added to the hour side (the left side):

9+1: 80-60

10:20

10:20 pm is the final answer.

Hope this helped;)

Which explanation best describes how to solve this problem? Gloria was taking photographs at a waterfall. She deleted 18 photographs. Then, during the hike from the waterfall, she took 13 more. She deleted another 9. Now Gloria has 22 photographs left. How many photographs did Gloria have to begin with?

A.Guess and test. Guess that Gloria had 40 photographs to begin with. Subtract the number she deleted (18) and add the number she took (13). Then subtract the second amount she deleted (9). This gives 26. That is 4 more than 22. Add 4 to your guess. Gloria had 44 photographs to begin with.

B.Draw a diagram. Draw a large circle to represent the photographs Gloria had to begin with. Add 22 dots, 18 dots, and 9 dots to the circle. Cross out 13 dots for the ones she took during the hike. Add all remaining dots to figure out that Gloria started with 36 photographs.

C.Translate into an equation. 18 + 13 + 9 – 22 = b
Gloria had 18 photographs to begin with.

D.Work backward. Start with the number of photographs that Gloria has left (22). Add the photographs that were deleted (18 + 9). Then add photographs that she took during the hike (13).
Gloria had 62 photographs to begin with.

Answers

i believe it is a but i will double check and post ok

An alloy of tin is 15% tin and weighs 20 pounds. A second alloy is 10% tin. How many pounds of the second alloy must be added to the first to get a 12% mixture? 30 lb 40 lb 60 lb

Answers

so, they alloy is hmmm some piece of metal.

it has tin, among other metals, regardless of what other metals it may have, we know that for the first one, 15% is tin, the rest something else, and we also know that the alloy itself, weights 20 lbs.

now, how much is just the weight of the tin metal in it alone? well, is 15% of 20 lbs, or (15/100) * 20, or 3 lbs, so of all those 20 lbs, only 3 lbs or 15% is tin.

for the second alloy, let's say we'll add "x" lbs, we know the second alloy is 10% tin, how much of that weight is tin? well 10% of x, or (10/100) * x, or 0.10x lbs.

now, we're looking for a mixture, say the resulting lbs of mix will be "y" lbs, and we know the mixture will be 12% of tin, how much is 12% of y? (12/100) * y, or 0.12y.

now, regardless of what "x" and "y" is, we know that 20 + x = y, and that 3 + 0.10x = 0.12y, thus

$\bf \begin{array}{lccclll} &\stackrel{lbs}{amount}&\stackrel{tin~\%}{quantity}&\stackrel{tin~lbs}{quantity}\n &------&------&------\n \textit{15\% alloy}&20&0.15&3\n \textit{10\% alloy}&x&0.10&0.10x\n ------&------&------&------\n mixture&y&0.12&0.12y \end{array} \n\n\n \begin{cases} 20+x=\boxed{y}\n 3+0.10x=0.12y\n ----------\n 3+0.10x=0.12\left( \boxed{20+x} \right) \end{cases} \n\n\n 3+0.10x=2.4+0.12x\implies 3-2.4=0.12x-0.10x \n\n\n 0.6=0.02x\implies \cfrac{0.6}{0.02}=x\implies 30=x$

Answer:

30 lb

Step-by-step explanation:

If m(x)= x+5/x-1 and n(x)=x-3, which function has the same domain as (m*n)(x)?

Answers

Using the domain concept, it is found that $f(x) = (1)/(x - 3)$ has the same domain as $(m * n)(x) = (x^2 + 4x - 5)/(x - 3)$

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The domain of a function is given by all possible values of the input.
The functions are:

$m(x) = (x + 5)/(x - 1)$

$n(x) = x - 3$

Their multiplication is given by:

$(m * n)(x) = (x + 5)/(x - 1) * x - 3 = ((x + 5)(x - 1))/(x - 3) = (x^2 + 4x - 5)/(x - 3)$

In a fraction, the denominator cannot be 0, thus, the domain is all real numbers except 3. A function with the same domain is one in which the numerator is changed while the denominator is the same, for example, $f(x) = (1)/(x - 3)$

A similar problem is given at brainly.com/question/10891721

h(x) = 11/x-4 Sorry this is so late.

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20a + 158 + 6c = 20 (6) +15(4) + 6(8)??+?2+?

Arrange in order from smallest to largest.6.09, 6.9, 6.099, 6.999