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larisa86 [58]
3 years ago
7

IS THIS CORRECT??????????

Mathematics
2 answers:
Alika [10]3 years ago
7 0
The correct answers are the 3rd and 4th ones.
r-ruslan [8.4K]3 years ago
7 0
The correct answers would be the third and fourth
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Consider the following data points.
Hoochie [10]

Answer:

the equation of the least-squares line for the data is: \hat Y=9.3+1.3x

Step-by-step explanation:

In a simple linear regression model, such as, \hat Y=b_0+b_1x, the coefficients bo and b1 are estimated through the method of least squares by the use of the equations:

b_1=\frac{S{xy}}{S_x^2}\\\\b_0=\bar{y}+b_1 \bar{x}

For the data provided you have to:

S_{xy}=\frac{\sum {(x_i-\bar x)(y_i-\bar y)}}{n-1}=3.25\\\\S_x^2=\frac{\sum {(x_i-\bar x)^2}}{n-1}=2.5\\\\\bar y=5.4, thus:

b_1=\frac{3.25}{2,5}=1.3\\\\b_0=5.4+1.3(3.0)=9.3

the equation of the least-squares line for the data is:

Y=9.3+1.3x

8 0
3 years ago
Read 2 more answers
Please help me out!!
ValentinkaMS [17]

Answer:

60 in³

Step-by-step explanation:

Prism A is 2×3×5 which is 30in³

Prism B is 2 times the height, which means it is 4×3×5 which is 60

6 0
3 years ago
mr sanchez owns a square field. the side lengths are 0.9 kilometers. there are 1980 prairie dog burrows in the field. what is th
nata0808 [166]
Density is the measurement of the amount of mass per unit of volume. 
In this case we should calculate the density of prairie dog burrows on a square field. This is a surface charge density.It is defined as the total amount of units q per km^2.
to calculate<span> the </span>density of prairie dog burrows, we should divide the total number of  prairie dog burrows in the field <span>by the size of the field. Thus,
</span><span>
 </span>prairie dog <span>burrows in square kilometers= number of dog burrows/ size of the field

size of the field=0.9*0.9=900*900=180000m^2
1980/180000</span><span> m^2= 0.011 dog burrows in square meter 
11 dogs in square kilometer</span>
5 0
3 years ago
Determine what to add to make the trinomial a perfect square. x2+8x+___
Nataly_w [17]

Answer: 16

Step-by-step explanation:

For a perfect square each factor is identical.

Now, we have to find a number that adds to get 8.

The only option is (x+4)(x+4). When you distribute, you get x²+8x+16.

Now, we know that the missing number is 16.

6 0
3 years ago
NEED HELP ASAP!
Nana76 [90]

Answer:

Step-by-step explanation:

bruh

4 0
3 years ago
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