Ask question

Ask question

All categories

3 years ago

8

Jefferson High School is looking to expand its student parking lot by expanding the existing lot as shown above. The size of the

new parking lot will be twice the size of the old parking lot. How many feet, x, was the old parking lot expanded by?

1 answer:

Art [367]3 years ago

7 0

Answer:

60

Step-by-step explanation:

You might be interested in

Help help help help help

algol [13]

Answer:

I'd say 7ft

Step-by-step explanation:

a square has equivalent sides so just divide 49.

<em>please correct me if im wrong.</em>

5 0

3 years ago

State restrictions on the variable.

Mandarinka [93]

There's one unforgivable taboo that transcends just about every branch of mathematics, and that's dividing by zero. Division by zero is undefined, so any fraction with a zero in its denominator is by definition absurd. For what values of x would the denominators on either of those fractions be zero? Those will define the restrictions on your variable.

7 0

3 years ago

Jackson has a table with a square top and he wants to buy a circular piece of lace that will cover the entire top of the table.

DedPeter [7]

Answer:

226.2

Step-by-step explanation:

I took the test. I hope this helps! :)

6 0

3 years ago

Given the data points, (x, y) of a linear function: (2, 11), (4, 10), (6, 9), (12, 6), what is the function? What is the slope?

NeX [460]

Answer:

The function is $y~=~12 ~-~ 0.5 \cdot x$ .

The slope is $m=-0.5$ .

The y-intercept is $b=12$ .

Step-by-step explanation:

Our aim is to calculate the values <em>m</em> (slope) and <em>b</em> (y-intercept) in the equation of a line :

$y=mx+b$

We have the following data:

$\begin{array}{c|cccc}x&2&4&6&12\\y&11&10&9&6\end{array}$

To find the line of best fit for the points given, you must:

Step 1: Find $X\cdot Y$ and $X\cdot X$ as it was done in the table below.

Step 2: Find the sum of every column:

$\sum{X} = 24 ~,~ \sum{Y} = 36 ~,~ \sum{X \cdot Y} = 188 ~,~ \sum{X^2} = 200$

Step 3: Use the following equations to find <em>b</em> and <em>m</em>:

$\begin{aligned} b &= \frac{\sum{Y} \cdot \sum{X^2} - \sum{X} \cdot \sum{XY} }{n \cdot \sum{X^2} - \left(\sum{X}\right)^2} = \frac{ 36 \cdot 200 - 24 \cdot 188}{ 4 \cdot 200 - 24^2} \approx 12 \\ \\m &= \frac{ n \cdot \sum{XY} - \sum{X} \cdot \sum{Y}}{n \cdot \sum{X^2} - \left(\sum{X}\right)^2} = \frac{ 4 \cdot 188 - 24 \cdot 36 }{ 4 \cdot 200 - \left( 24 \right)^2} \approx -0.5\end{aligned}$

Step 4: Assemble the equation of a line

$\begin{aligned} y~&=~b ~+~ m \cdot x \\y~&=~12 ~-~ 0.5 \cdot x\end{aligned}$

The graph of the regression line is:

5 0

3 years ago

The perimeter of the rectangle is 24 cm. Find the value of x.

cluponka [151]

There's not enough information to solve this.

4 0

3 years ago