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777dan777 [17]
3 years ago
10

1. Tell whether the line containing (-1,-2) and (4,4) and the line containing

Mathematics
1 answer:
AveGali [126]3 years ago
7 0

Step-by-step explanation:

Two lines are parallel if they have the same slope.

To find the slope of the line that passes through two points, (x_{1}, y_{1}) and (x_{2}, y_{2}), you can use the following formula:

\frac{y_{2} - y_{1}}{x_{2} - x_{1}}

For the first set of points, (-1, -2) and (4, 4), we can find the slope with the following:

\frac{4 - (-2)}{4 - (1)}

\frac{4 + 2}{4 + 1}

\frac{6}{5}

For the second set of points, (6, 3) and (-1, -3), we can find the slope with the following:

\frac{-3 - 3}{-1 - 6}

\frac{-6}{-7}

\frac{6}{7}

Since the two slopes are \frac{6}{5} and \frac{6}{7}, the two lines are not parallel.

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Hi I hope you are all okay could someone help me with this math question thankyou !!!
earnstyle [38]

Answer:

x = 49

Step-by-step explanation:

Given the mathematical expression and data;

y = 1/√x

y = 7 and x = 64

First of all, we would find the constant of proportionality, k;

y = k/√x

7 = k/√64

7 = k/8

k = 7 * 8

k = 56

Next, to find the value of x, when y = 8

y = k/√x

Substituting the values, we have;

8 = 56/√x

Cross-multiplying, we have;

8 * √x = 56

√x = 56/8

√x = 7

Taking the square of both sides, we have;

(√x)² = 7²

x = 49

8 0
3 years ago
To find the value of as well as the uncertainty in 2. Use the given value and uncertainty in for the following equations. a) 3.1
Masteriza [31]

Answer:

msrhvdaryhbdwthnvaryhjjihgvdetgbbddrgbyfhvjbjbvycfbSORRYbuvxgvjbj NB if he g

3 0
3 years ago
The Environmental Protection Agency (EPA) publishes fuel economy values that are known to be good estimates of the fuel economy
r-ruslan [8.4K]

Answer:

The 90% confidence interval for the mean combined fuel economy for Ford Explorers is between 22.95 and 23.63 mpg.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 16 - 1 = 15

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 15 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 1.7531

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.7531\frac{0.78}{\sqrt{16}} = 0.34

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 23.29 - 0.34 = 22.95 mpg

The upper end of the interval is the sample mean added to M. So it is 23.29 + 0.34 = 23.63 mpg

The 90% confidence interval for the mean combined fuel economy for Ford Explorers is between 22.95 and 23.63 mpg.

7 0
3 years ago
A small box can hold 5 chocolates and a big box can hold 12 chocolates. A factory produces 600 chocolates and packs them into bo
stepan [7]

Answer:

Answer to B - 20

480 + 96 = 600

Step-by-step explanation:

12 x 40 = 480

5 x 4 = 20

3 0
3 years ago
Andrea needs 4 kilograms of oranges. The scale below shows the weight of the oranges she has in her kitchen. Part A. About how m
juin [17]
We know that

<span>each space on the balance represents
1 kg/ 10 spaces----------> 0.10 kg
in the picture there are 14 spaces
so
14*0.1-------> 1.4 Kg
</span>
Part A) About how many kilograms of oranges does Andrea have? Round your answer to the nearest kilogram

Andrea has 1.4 kg of oranges------> to the nearest kilogram-----> 1 Kg

the answer is
1 kg

Part B) About how many more kilograms of oranges does Andrea need?
Andrea needs=(4 Kg-1.4 Kg)------> 2.6 Kg

the answer part B) is
2.6 Kg
8 0
3 years ago
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