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TEA [102]
2 years ago
13

for simultaneous equations in variables x and y d x² = 49 Dy= -63, D= 7 then what is the value of x?​

Mathematics
1 answer:
Ket [755]2 years ago
3 0

Step-by-step explanation:

hope it will be helpful to you

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I<br> Need. Dis quickly my sis will get mad
blsea [12.9K]

Answer:

can I see a copy of the picture? I will edit answer once I can see the picture of the gingerbread man

3 0
3 years ago
Assume the sample below is a perfectly random sample of students at a school. How much greater is the mean of the
igor_vitrenko [27]

Answer:

0.75

Step-by-step explanation:

The table is not well presented (See Attachment)

There are at least two approaches to this question

Method 1:  

Steps

1. Calculate the mean of reported heights

Mean of reported heights = (61+68+57.5+48.5+75+65+80+68+69+63)/10

Mean of reported heights = 655/10

Mean of reported heights = 65.5

2. Calculate the mean of measured heights

Mean of measured heights = (62 + 68 + 56.5 + 47 + 72 + 65 + 78 + 67 + 69.5 + 62.5)/10

Mean of measured heights = 647.5/10

Mean of measured heights = 64.75

3. Get their difference

Difference = Mean of reported heights - Mean of measured heights

Difference = 65.5 - 64.75

Difference = 0,75

Method 2: Calculate the mean of their difference

Mean of difference = Sum of difference / Number of observations

Mean of difference = (-1 + 0 + 1 + 1.5 + 3 + 0 + 2 + 1 – 0.5 + 0.5)/10

Mean of difference = 7.5/10

Mean of difference = 0.75

Note that in both cases, the result is 0,75.

Hence, the reported heights at the school is 0.75 greater than the actual measured height

3 0
3 years ago
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The function f is defined by the following rule
swat32

Answer:-18

-6

0

3

9

Step-by-step explanation:

3 0
3 years ago
Round to the underlined place​
DENIUS [597]

Answer:

i think it would be 75.40

Step-by-step explanation:

The 6 would bring the 3 up one.

5 0
3 years ago
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List the multiples of 4 starting from 40
Alexxandr [17]

40,44,48,52,56,60,64,68,72,76,80.........

4 0
3 years ago
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