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Svetllana [295]
3 years ago
15

I need help please and thank you

Mathematics
2 answers:
Sav [38]3 years ago
4 0

Answer:

135

Step-by-step explanation:

I solved it step by step in picture. U can have a look. ✌️

Vera_Pavlovna [14]3 years ago
3 0
SA=2(lw)+2(lh)+2(hw)
So
SA=2(5*9)+2(9*3)+2(5*3)
SA=2(45)+2(27)+2(15)
SA=90+54+30
SA=174ft
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3. The area of a rectangular deck, in square meters, is given by the polynomial 40p2 + 24p.
lorasvet [3.4K]

Answer:

Length = 5p + 3

Perimeter = 26p + 6

Step-by-step explanation:

Given

Area = 40p² + 24p

Width = 8p

Solving for the length of deck

Given that the deck is rectangular in shape.

The area will be calculated as thus;

Area = Length * Width

Substitute 40p² + 24p and 8p for Area and Width respectively

The formula becomes

40p² + 24p = Length * 8p

Factorize both sides

p(40p + 24) = Length * 8 * p

Divide both sides by P

40p + 24 = Length * 8

Factorize both sides, again

8(5p + 3) = Length * 8

Multiply both sides by ⅛

⅛ * 8(5p + 3) = Length * 8 * ⅛

5p + 3 = Length

Length = 5p + 3

Solving for the perimeter of the deck

The perimeter of the deck is calculated as thus

Perimeter = 2(Length + Width)

Substitute 5p + 3 and 8p for Length and Width, respectively.

Perimeter = 2(5p + 3 + 8p)

Perimeter = 2(5p + 8p + 3)

Perimeter = 2(13p + 3)

Open bracket

Perimeter = 2 * 13p + 2 * 3

Perimeter = 26p + 6

4 0
4 years ago
Help me fast please<br> lskrwe
Elanso [62]

Answer: c = 1.59 * a

Step-by-step explanation:

You got the answer correct.

8 0
3 years ago
Read 2 more answers
The length of a photograph is 3cm less than twice the width. The area is 54cm². Find the dimentions of the photograph.
AnnyKZ [126]
L=2w-3 

w(2w-3)=54

2w²- 3w-54=0

A= 2 , B= -3, C= -54

sub values into quadratic formula
 i attached picture of formula

Final answer:  you will be given 2 answers 6 and -4.5. -4.5 is rejected since a negative value cannot represent length because that just doesn't make sense.

w=6

Check:
L=2w-3
=2(6)-3
=12-3
=9
  9*6=54

Therefore the dimensions of the photograph are 6 cm by 9 cm



3 0
4 years ago
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Expand and simplify (x+3)(x-4)
Vinvika [58]

Answer:

the following term =

x { }^{2}  - x - 12

Step-by-step explanation:

here's the explanation in attached image.

i hope it helped

4 0
3 years ago
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If your brakes suddenly give out and your car is about to hit a tree, what should you never do?
inysia [295]
The one thing you should never do is go faster


4 0
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