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Ulleksa [173]
2 years ago
5

Please help Vghjhjbjbjbjh

Mathematics
2 answers:
timofeeve [1]2 years ago
8 0

Answer:

Step-by-step explanation:

slega [8]2 years ago
7 0
You will end up with 5p-11
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If it takes 30 minutes to fill a 750000 cm3 (cubed) pool
Gala2k [10]
Step 1: Find out how many cm3 is filled in a minute.
750000/30 = 25000cm3 per minute
Step 2: Find out how many minutes it takes to fill 1200000cm3.
1200000/25000 = 48 minutes

Answer: 48 minutes
5 0
3 years ago
Read 2 more answers
Evan wants to build a rectangular enclosure for his animals. One side of the pen will be against the barn, so he needs no fence
pentagon [3]

Answer:  A.   A=(1000-2w)*w      B. 250 feet

C.  125 000 square feet

Step-by-step explanation:

The area of rectangular is A=l*w    (1)

From another hand the length of the fence is 2*w+l=1000        (2)

L is not multiplied by 2, because the opposite side of the l is the barn,- we don't need in fence on that side.

Express l from (2):

l=1000-2w

Substitude l in (1) by 1000-2w

A=(1000-2w)*w        (3)   ( Part A. is done !)

Part B.

To find the width w  (Wmax) that corresponds to max of area A   we have to dind the roots of equation (1000-2w)w=0  ( we get it from (3))

w1=0  1000-2*w2=0

w2=500

Wmax= (w1+w2)/2=(0+500)/2=250 feet

The width that maximize area A is Wmax=250 feet

Part C.   Using (3) and the value of Wmax=250 we can write the following:

A(Wmax)=250*(1000-2*250)=250*500=125 000 square feets

3 0
2 years ago
What is the value of 4r^2-8 when r=3?
Vlad [161]

Answer:

28

Step-by-step explanation:

So this means to replace the r you see in 4r^2-8 with 3.

Let's do that:

4(3)^2-8

Now to simplify this just use pemdas or a calculator:

4(9)-8     since 3^2 means 3*3=9

36-8

28

5 0
3 years ago
Read 2 more answers
1 <br>-6a × - <br> 2 <br>Another time :/ , I'm studying for my post mid term exams..​
Zepler [3.9K]

Answer:

<em>a×</em>

<em>a×_</em>

<em>a×_12 </em>

Step-by-step explanation:

1

_

-6

_

2

6×2=12

a×

_

6

_

2

ax

_12

8 0
2 years ago
a parallelogram has one side that is 4 centimeters long and one side that is 6 centimeters long. what is the perimeter of the pa
Ilia_Sergeevich [38]

Answer:

P = 20 cm

Step-by-step explanation:

The appropriate formula is P = 2W + 2L.

Here that comes to P = 2(6 cm) + 2(4 cm) = 20 cm

6 0
3 years ago
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