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3 years ago

No estimating in this question.

Mathematics

1 answer:

nekit [7.7K]3 years ago

5 0

Driving 350 miles requires

(350 mi) / (10.4 mi/L) ≈ 33.65 L

of petrol.

This amount of petrol would cost

(33.65 L) × (£1.29/L) ≈ £43.41

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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

Py+7=6y+qp, y, plus, 7, equals, 6, y, plus, q y=y=y, equals

Archy [21]

Py +7 = 6y + qp

Solve the equation for y

To solve the equation for y we need to get y alone

Py +7 = 6y + qp

Subtract 6y from both sides

Py - 6y +7 = + qp

Subtract 7 from both sides

Py - 6y = + qp - 7

Now factor out y

(P - 6)y = qp - 7

Divide by P - 6 from both sides

$y =\frac{qp - 7}{(P - 6)}$

6 0

4 years ago

Read 2 more answers

A square is always an example of a: I. rectangle II. rhombus III. parallelogram I I, II, and III none of these II

Igoryamba

It's always a Parallelogram

4 0

3 years ago

HOW can you use models to find volume?

Svetradugi [14.3K]

You can find the dimensions of the model and plug them into the formula for volume (length x width x height)

5 0

3 years ago

What’s 7= y-2/3 if you’re solving for y

Rus_ich [418]

Answer:

y = 23/3

Step-by-step explanation:

Simplify both sides of equation

7 = y + -2/3

Flip equation

y + -2/3 = 7

Add 2/3 to both sides

y + -2/3 + 2/3 = 7 + 2/3

y = 23/3

6 0

3 years ago