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Sunny_sXe [5.5K]
3 years ago
10

Quincy claims that if 80 coats are sold, the outside temperature is likely to be about 42°

Mathematics
2 answers:
r-ruslan [8.4K]3 years ago
7 0

Answer:

C- No Quincy should have used the trend line to find the corresponding x value when y=80

Step-by-step explanation:

i just did it

nikklg [1K]3 years ago
6 0

No. Quincy should have used the trend line to find the corresponding x value when y=80.


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Answer:

161 cm

Step-by-step explanation:

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Suppose m = 2 + 6i, and | m + n | = 3√10, where n is a complex number.
Ksju [112]

Answer: a) √50

b) n = 1 + 7i

Step-by-step explanation:

first, the modulus of a complex number z = a + bi is

IzI = √(a^2 + b^2)  

The fact that n is complex does not mean that n doesn't has a real part, so we must write our numbers as:

m = 2 + 6i

n = a  + bi

Im + nI = 3√10

Im + n I = √(a^2 + b^2 + 2^2 + 6^2)= 3√10

            = √(a^2 + b^2 + 40) = 3√10

             a^2 + b^2 + 40 = 3^2*10 = 9*10 = 90

             a^2 + b^2 = 90 - 40 = 50

            √(a^2 + b^2 ) = InI = √50

The modulus of n must be equal to the square root of 50.

now we can find any values a and b such a^2 + b^2 = 50.

for example, a = 1 and b = 7

1^2 + 7^2 = 1 + 49  = 50

Then a possible value for n is:

n = 1 + 7i

6 0
3 years ago
Find the area of the composite figure below.
TiliK225 [7]

Answer:

A  =  139.25

Step-by-step explanation:

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