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yan [13]
3 years ago
8

Lee wants to cut this piece of canvas into two rectangles that are 3x2 and 3x5. He wants the sum of the two small rectangles to

be the same as the area of the large rectangle. Can he do this? explain
Mathematics
1 answer:
lord [1]3 years ago
8 0
Yes because 3×2= 6 , 3×5= 15, 15 + 6 = 21
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Ten pairs of data yield r = 0.003 and the regression equation =2+3x Also, the mean = 5 What is the best predicted value of y for
Olenka [21]

Answer:

\hat y(2)=2 +3(2) =8

C 8.0

Step-by-step explanation:

Assuming the linear model y=mx+b where m is the slope and b the intercept.

For this case the slope with the following formula:

m=\frac{S_{xy}}{S_{xx}}

Where:

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}

b=\bar y -m \bar x

After the calculations we see that m=3 and b=2 from the info given by the linear model.

For this case we have the equation obtained by least squares given by:

\hat y =2 +3x

Where 2 represent the intercept and 3 the slope. We are interested on the best predicted value of y when x=2.

If we see our linear model we have the equation in terms of y and x. So we can replace directly the value of x=2 into the equation and see what we got:

\hat y(2)=2 +3(2) =8

5 0
3 years ago
Frank is designing a new walkway for his house. He is using concrete stones to make the walkway. He knows he will need 50 pounds
dexar [7]

Answer:

a

Step-by-stepe

I already did it

6 0
3 years ago
Compute the permutation.
Kipish [7]
We have two slots A and B
Slot A has 4 choices (2,4,5,8)
Once we make a choice, we can't reuse it. So we have 3 choices left for slot B

Multiply out the values mentioned above to get: 4*3 = 12

Alternatively you can use the nPr formula to get
n P r = (n!)/(n-r)!
4 P 2 = (4!)/(4-2)!
4 P 2 = (4!)/(2!)
4 P 2 = (4*3*2*1)/(2*1)
4 P 2 = 24/2
4 P 2 = 12
yielding the same answer

So no matter which method you use, the final answer is 12

6 0
3 years ago
The ratio of cows to pigs on the farm is
zheka24 [161]

Answer:

40

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Any help is apprenticed!
nirvana33 [79]
This is the answer. Hope it helps

5 0
3 years ago
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