PLEASE PLEASE PLEASE HELP!! Explanations on how to set it up would be great!

Mathematics

2 answers:

Gala2k [10]2 years ago

6 0

The most precise name is a rectangle. We can narrow down from parallelogram because it has right angles. We cannot go to a square because it does not have equal sides.

cricket20 [7]2 years ago

3 0

The answer is rectangle. 2 short sides two long.

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The area of a rectangle is 14 m2 , and the length of the rectangle is 3 m less than double the width. find the dimensions of the

muminat

Width =3.5, length = 4

Let's make a few equations to summarize what we know.:
a = 14
l = 2w -3
a = wl

Now let's substitute the expression for l into the expression for area and solve.
a = w(2w - 3)
a = 2w^2 - 3w
14 = 2w^2 - 3w

0 = 2w^2 - 3w - 14

which factors into
(2w - 7) (w + 2)

Solving for w
2w - 7 = 0
2w = 7
w = 3.5

w+2 = 0
w = -2

So w can be either 3.5 or -2. Since a negative width doesn't make sense, w = 3.5

Let's verify
w = 3.5
l = 2w - 3
l = 2*3.5 - 3
l = 7 - 3
l = 4
a = wl
a = 3.5 * 4
a = 14

So the width is 3.5 and the length is 4.

3 0

3 years ago

Write 2/15 as a decimal.

Cloud [144]

If you need to write a number as a decimal, it means that you need to write is a an x divided by a power of 10.
you can use this formula:
$\frac{2}{15} = \frac{x}{10}$

now let's multiply both sides by 10:
$\frac{20}{15} = x$
and simplyfy:
(by dividing the first fraction's elements by 5)
$\frac{4}{3} = x$

change improper fraction into a mixed number
$1\frac{1}{3} = x$

and 1 over 3 is 0.33333...

so the answer is 1.333333 - we can also write it as 1.(3)

5 0

3 years ago

4n+78n-3/4=942???<br>PLEASE SHOW STEPS ON HOW YOU GOT IT!

Rainbow [258]

4n+78n-3/4=942
     l
   82n - 3/4=942
           +3/4 +3/4(.75)
    82n=942.75
    divide 82 by both sides
     n = 11.49 or 11.5

6 0

3 years ago

Read 2 more answers

A positive <br> B negative <br> C none<br> D multiple

egoroff_w [7]

The answer is positive because its is going in the positive column

8 0