I don't know what ur supposed to do but if u add them it equals 31.9 sorry if that's not what you have to do
The answer is 120 instead of 12 because 12 equals 7.2
Answer:
a because you dont have to pay that much back your your friend if you dont buy the magazines then you will only have to pay $12 to your friend and if you buy the magazines then you have to pay $21
Step-by-step explanation:
Answer:
x=28 or C
Step-by-step explanation:
The graph shows a right angle which is 90 degrees
This means that the two angles seperated by line C added together will get 90 degrees.
That means the formula will be 2x+1+33=90
With that shown we can get rid of A and B
Next step is to add 33 and 1 together
This gives us 2x+34=90
Then we will move 34 to the other side by subtracting giving us 2x=90-34
Then we will subtract 90-34 which will get us 56
The equation is now 2x=56
The last step is to devide 2 from each side
This lets us get the answer x=28
Hope this helps!
Answers:
- 3. E) -0.8
- 4. True
- 5. True
- 6. True
- 7. D) 17.62%
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Explanations:
3. We have negative correlation because the regression line is going downhill (move from left to right). The points are fairly close to the same regression line, so I'd say we have either moderate or fairly strong negative correlation. That means r is fairly close to -1. It's not -1 exactly since that would have to mean all points are on the same line.
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4. Negative correlation goes with negative r values. Refer to problem 3. Positive correlation goes to positive r values. The r value will most likely not equal the slope value, but they share the same sign.
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5. If r is close to +1, then we have fairly strong positive linear correlation. If r is close to -1, then we have fairly strong negative linear correlation. If r = 0 or close to it, then we should use some other kind of regression tool. Or perhaps the data points are simply randomly scattered about and they have no pattern at all.
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6. Refer to problem 5.
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7. Plug in x = 15 and you should find that y = -0.632(15)+27.1 = 17.62, which means that the estimated tip is roughly 17.62% of the bill.
