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mote1985 [20]
2 years ago
14

The number of hours per week that the television is turned on is determined for each family in a sample. The mean of the data is

32 hours and the median is 28.2 hours. Twenty-four of the families in the sample turned on the television for 17 hours or less for the week. The 11th percentile of the data is 17 hours. Step 2 of 5 : Approximately how many families are in the sample? Round your answer to the nearest integer.
Mathematics
1 answer:
Zigmanuir [339]2 years ago
7 0
I don’t know skip that question
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Knowing that 2i is one answer to the equation x^4 - 2x^3 + 6x^2 - 8x + m = 0, find the 'm' and the other possible answers.
kakasveta [241]
Ok so remember
if a+bi is a root, then a-bi is also a root

since 2i is a root, -2i is also a root
use synthetic division and the fact that when we divide by 2i and -2i, we have to get all real coeficients and end witha zero at the end
I will show the division in the attachment

we find m=8


we then find th resulting equation that is x^2-2x+2=0
quadratic formula
x=\frac{-b+/- \sqrt{b^{2}-4ac} }{2a}
x=1+i or 1-i







m=8 and the other roots are
x=-2i, 1+i, 1-i


4 0
3 years ago
Last night, the temperature fell from 0°F to -13 in 4 hours. What was the average temperature change per hour?
vovangra [49]

hello. your answer is -3. I just took the assignment. hope it helps.

8 0
3 years ago
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PLSSS HELP!!! 40 pts!!!!
quester [9]

Answer:

∠1=135°

∠2=45°

∠3=45°

∠4=135°

∠5=135°

∠6=45°

∠7=45°

∠8=135°

Step-by-step explanation:

→∠1=∠4[Being vertically opposite angles]

→∠4=135°

→∠1=∠5[Corresponding angles]

→∠5=135°

→∠5=∠8[Being vertically opposite angles]

→∠8=135°

→∠1+∠2=180°[Sum of linear pair]

→∠2=180°-135°

→∠2=45°

→∠2=∠3[Being vertically opposite angles]

→∠3=45°

→∠3=∠6[Alternate angles]

→∠6=45°

→∠6=∠7[Being vertically opposite angles]

→∠7=45°

3 0
2 years ago
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Help ASAP will give BRAINLIEST
Fudgin [204]

Answer: The new coordinates are A(0, 0) B(-4, -2) C(0, -5)

Step-by-step explanation: The formula for 90 degrees counter-clockwise is (x, y) to (-y, x)

8 0
3 years ago
Can anyone find out what this is?
Charra [1.4K]

Answer:

Expression D

Step-by-step explanation:

all other answers are above 15! hope this helps :D

4 0
2 years ago
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