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12345 [234]
4 years ago
11

Consider the planes 2x + 1y + 5z = 1 and 2x + 5z = 0.

Mathematics
1 answer:
AleksandrR [38]4 years ago
3 0
B is easy, given 2x + 1y + 5z = 1 and 2x + 5z = 0, normal vectors of those planes are (2,1,5) and (2,0,5), cross product will give the parallel vector, divide by its length so it gives the unit vector
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In ΔQRS, the measure of ∠S=90°, the measure of ∠Q=54°, and RS = 26 feet. Find the length of QR to the nearest tenth of a foot
algol [13]

SOH-CAH-TOA

sin Q     =    <u>Opposite</u>     =    <u>26</u>

                 hypotenuse          x

sin 54   =     <u>26</u>

                     x

x sin 54 = 26

<u>x sin 54</u>      =     <u>     26    </u>

sin 54                sin 54

x =     <u>    26   </u>    =    32.1378  ≈  32.1 feet

          sin 54

5 0
3 years ago
An observational study determined that there is a strong correlation between eating breakfast and weight loss. Can it be determi
mylen [45]

A common misconception in statistics is confusing correlation with causation. If two events are correlated, it merely means that they share the same behaviour over time, but it doesn't imply in any way that those event are related by a common cause, or even worse, that one implies the other.

You can find several (even humorous) counter examples online. For example, if you plot the number of reported pirates assault against the global temperature in the last years, you'll se that temperature is rising (unfortunately...) while pirates are almost disappearing.

One could observe this strong negative correlation and claim that hotter climate has solved the pirate issue. Of course this is a joke, but it explains why you shouldn't confuse correlation with causation.

7 0
3 years ago
On Friday,
dimaraw [331]
I would make both denominators the same, and the lowest one that works is 18. So I'd make 1/9 into 2/18, and 1/6 into 3/18. They already used these times so combine them to make 5/18 then subtract that from the total time they had (18/18) and you would get 13/18 they spent playing music.
5 0
3 years ago
Really need help . Find the missing value that makes the two expressions equivalent
IceJOKER [234]

Answer:

1. 4

2. 5

3. 9

Step-by-step explanation:

1.

4(x+3y)

4x+12y=4x+12y

2.

5(7x+10y)

35x+50y=35x+50y

3.

9(2x+y)

18x+9y=18x+9y

i hope this helps!

6 0
3 years ago
Order each set of integers from least to greatest; -55, 143, 18, -79, 44, 101
pickupchik [31]
-79, -55, 18, 44, 101, 143
3 0
3 years ago
Read 2 more answers
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