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GREYUIT [131]
3 years ago
5

The perimeter of a rectangle is 128 cm, and the ratio of its sides is 5: 3. Find the area of ​​a rectangle

Mathematics
2 answers:
blondinia [14]3 years ago
7 0

Answer:

Area of the rectangle =15 cm^2

Step-by-step explanation:

Perimeter of the rectangle= 128 cm

Ratio of length to width is:

\frac{Length}{Width}= \frac{5}{3} \\\\Length=5 cm\\\\Width=3 cm

Area of the rectangle= Length*Width

=5cm*3cm\\\\=15cm^2

Area of the rectangle =15 cm^2

Akimi4 [234]3 years ago
4 0

Answer:

960 cm^2

Step-by-step explanation:

length: width

5  :3

Multiply by x

5x  ; 3x

The perimeter of a rectangle is found by

P =2(l+w)

128 = 2 (5x+3x)

Combine like terms

128 = 2(8x)

128 = 16x

Divide each side by 16

128/16 = 16x/16

8 =x

length : width

5*8:  3*8

40 : 24

We need to find the area

A = l*w

  = 40*24

   =960

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Alex787 [66]

Step-by-step explanation:

Draw diagonal AC

The triangle ABC has sides 17 and 25

Say AB is 17, BC is 25

Draw altitude on side BC from A , say h

h = 17 sin B

Area = 25*17 sin B = 408

sin B = 24/25

In ∆ ABC

Cos B = +- 7/25

= 625 + 289 — b^2 / 2*25*17

b^2 = 914 — 14*17 = 676

b = 26

h = 17*24/25 = 408/25 = 16.32

Draw the second diagonal BD

In ∆ BCD, draw altitude from D, say DE =h

BD^2 = h^2 + {(25 + sqrt (289 -h^2) }^2

BD^2 = 16.32^2 + (25 + 4.76)^2

= 885.6576 + 266.3424

BD = √ 1152 = 33.94 m

6 0
3 years ago
An indoor trampoline park has an admission fee, plus an hourly charge. The graph displays the total cost from 3, 4, 5, and 6 hou
defon

Answer:

 $4.5 per hour

Step-by-step explanation:

Hope this was accurate and help full. I hope you have a lovely day!

3 0
3 years ago
Read 2 more answers
Plz help i need help asap
tiny-mole [99]

Answer:

20 outcomes

Step-by-step explanation:

the outcomes of the first times the outcomes of the second

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5 0
3 years ago
Write the 2 digit number that matches the clue
Wittaler [7]
You can figure this out by setting up an equation and make

x= tens digit
y= ones digit

y + 8 =x (tens digit 8 more than ones)

also we know that 

y>0
x>0

since the 10s digit and 1s digit cannot be more than one number, we can say

0 < y > 10
0 < x > 10

since x has to be greater than 0 but less than 10, there is only one number that would fit into the equation for y

2 + 8 = 10
(y cannot equal 2 because than x is equal to 10 and it must be less than)

1 + 8 = 9 
( y can be 1 since x is less than 10)

so it would be 
y= 1
x= 9

the number would be 91

hope this helped!




5 0
3 years ago
The FOIL method is used to multiply a binomial by a binomial.<br> True<br> O<br> False
riadik2000 [5.3K]

Answer:

True

Step-by-step explanation:

4 0
3 years ago
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