All categories

3 years ago

Rectangle area w algebra step by step explanation please :)

Mathematics

1 answer:

Natalija [7]3 years ago

8 0

We know that the area is 20.

Since 20 is a small number: lets list out possible combinations of lengths and widths.

1 * 20

2 * 10

4 * 5

L = 7 + 3w

lets see which on makes sense.

L = 7 + 3w

20 = w7 + 3w^2

3w^2 + 7w -20 = 0

(3w - 10)(w - 2)

w can equal 10/3 or 2.

So the dimensions: are Width = 2 Length = 10

You might be interested in

Liam's bottle had 2 1/2 cups of juice in it. He drank 1/3 of the juice in his bottle. How many cups of juice did Liam drink?

myrzilka [38]

You basically have to do 2 1/2 times 1/3....

$2 \frac{1}{2} * \frac{1}{3} = \frac{5}{2} * \frac{1}{3} = \frac{5*1}{2*3} = \frac{5}{6} \ \textless \ -answer$

5 0

3 years ago

Read 2 more answers

Use the table and a calculator to help you find a solution to 0.1. 2* = 4, rounded to the nearest whole number.

lina2011 [118]

Asolution of the equation ƒ(x ) = g(x ) is the same as (select all that apply)

The x-value of a solution to the system of equations y = ƒ(x ) and y = g(x ).

The x-coordinate of an intersection point of the graphs of y = ƒ(x ) and y = g(x ).

The y-coordinate of an intersection point of the graphs of y = ƒ(x ) and y = g(x ).

6 0

2 years ago

4267 divided by 31 in mixed number form

Rainbow [258]

Mixed Number Form:
<span>137 </span> $\frac{20}{31}$

8 0

3 years ago

Point

iren [92.7K]

377.58 kilograms ur welcomeee

4 0

3 years ago

A statistics professor gives a survey to each of the 20 students in an introductory statistics course. The survey asks the stude

tekilochka [14]

Answer:

$B2 = 0.465$ --- Population standard deviation

$C2 = 0.216$ --- Population Variance

Step-by-step explanation:

Given: Wake-up time data

Required: Determine the population standard deviation and the population variance using Excel

First, enter the given data in Excel

For this question, I entered the data in cell A2 through cell A21

Cell B2 and Cell C2 were used to hold the results of the population standard deviation and the population variance, respectively.

In cell B2, the formula to use is:

=ROUNDUP(STDEV.P(A2:A21),3)

The round function rounds the result to 3 decimal places while STDEV.P calculates the population standard deviation.

So, the result is:

$B2 = 0.465$

In cell C2, the formula to use is:

=ROUND(VAR.P(A2:A21),3)

The round function rounds the result to 3 decimal places while VAR.P calculates the population variance.

So, the result is:

$C2 = 0.216$

<em>See attachment for Excel file</em>

Download xlsx

3 0

3 years ago