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Andre45 [30]
3 years ago
6

Please help me with this all 2-18 while i do the rest of my work

Mathematics
1 answer:
AlexFokin [52]3 years ago
7 0

Answer:

2.26       13.-8

3.-14       14.-1

4.-12       15.3

5.-15       16.-3

6.-5        17.8

7.-15       18.-20

8.-2

9.39

10.-125

11.-50

12.29

Step-by-step explanation:

Your welcome

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An equation for annealing soda-lime glass is y(t)=−14t+500 , where t is time in minutes and y is the temperature of the glass in
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An equation for annealing soda-lime glass is y(t)=−14t+500 , where t is time in minutes and y is the temperature of the glass in ˚C.

To find the y intercept , we plug in 0 for t

y intercept is the value , where time is 0 minutes

so we plug in 0 for t  and find out y(0)

y(t)=−14t+500

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So , y intercept is (0,500)


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3 years ago
A shop has 55 posters for sale. 34 posters show sports. The rest of the posters show animals. How many posters show animals?
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This is a subtraction problem so it would read 55-34 and the answer is 21 posters are animals.
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3 years ago
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A researcher spoke to 20 people running a marathon in which 1,400 people participated. Of those 20 people, 5 competed only in pr
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Which expression represents the ratio of the difference of the two means to Sidney's mean absolute deviation
prohojiy [21]

Answer:

The ratio of the difference of the two means to Sidney's mean absolute deviation = \frac{4}{3.28} = 1.2195

Step-by-step explanation:

P.S - The exact question is -

Given - The means and mean absolute deviations of Sidney’s and Phil’s grades are shown in the table below.

                                       Sidney’s Grades           Phil’s Grades

Mean                                     82                                    78

Mean Absolute Deviation      3.28                                 3.96

To find - Which expression represents the ratio of the difference of the two means to Sidney’s mean absolute deviation?

Proof -

Given that Mean of Sidney Grades = 82

                 Mean of Phil's   Grades = 78

So,

The difference of two means = 82 - 78 = 4

Also,

Given, Mean Absolute Deviation of Sydney = 3.28

Now,

The ratio of the difference of the two means to Sidney's mean absolute deviation = \frac{4}{3.28} = 1.2195

4 0
3 years ago
What is unknown number in proportion?
elena-14-01-66 [18.8K]

Answer:

x = 2.4/20= 0.12

Step-by-step explanation:

Multiply both sides by 4 to eliminate the fraction 1/4:

1      20

--- = ------

x      2.4

Next, we cross-multiply.  This eliminates the fractions:

20x = 2.4

Dividing both sides by 20 results in an equation for x:  x = 2.4/20= 0.12

4 0
3 years ago
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