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Savatey [412]
3 years ago
7

the width of a rectangle is 2/3 the length. the perimeter of the rectangle is 15 centimeters. what is the length of the rectangl

e
Mathematics
1 answer:
tester [92]3 years ago
4 0
Lenght is 4 1/2 cm
P=2L +2W
15cm = 2L + 2(2/3L)
15cm = 2L + 4/3L
15cm = 2 4/3 L
15cm ÷ 2 4/3  = 2 4/3L ÷ 2 4/3
4 1/2cm = L

Check
P=2L +2W
P=2(4.5) +2(3)
15= 9 +6
15=15
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Hey plz help and show work
blsea [12.9K]
The dog house consists of two geometric objects, triangular prism and rectangular prism.

First, find the surface area of triangular prism
The triangular prism consists of
base of triangle (b) = 3 ft
height of triangle (h) = 2.5 ft
height of prism or length of rectangle (l) = 4 ft
side of triangle or width of rectangle (w) = 2.5 ft

Now, calculate the area
area of tp = area of two triangle + area of 2 rectangle
area of tp = (2 × 1/2 × b × h) + (2 × l × w)
area of tp = (2 × 1/2 × 3 × 2) + (2 × 4 × 2.5)
area of tp = 6 + 20
area of tp = 26 ft²

Second, find the surface area of rectangular prism
The rectangular prisms consists of
length (l) = 3 ft
width (w) = 4 ft
height (h) = 2 ft

Now, calculate the area
area of rp = area of back and front rectangle + area of left and right rectangle
area of rp = (2 × l × h) + (2 × w × h)
area of rp = (2 × 3 × 2) + (2 × 4 × 2)
area of rp = 12 + 16
area of rp = 28 ft²

Third, add both of the area
area = area of tp + area of rp
area = 26 + 28
area = 54 ft²

The area of the dog house is 54 ft
²
6 0
3 years ago
Please help due tomorrow
mel-nik [20]

Answer: x= 2.5, y = 10

Step-by-step explanation:

<u><em>I'm going to assume that these photocopies are proportional in relations to each other.</em></u>

If they're proportional, you can set up two proportions:

1) \frac{x}{5} =\frac{3}{6} \\\\2) \frac{5}{y} =\frac{3}{6}

And cross-multiply:

1) 6x = 5*3 \\\\2) 3y = 5*6

Then solved for x and y:

1) 6x = 15\\x=\frac{15}{6} =\frac{5}{2} =2.5 \\\\2) 3y = 30\\y=\frac{30}{3} =10

5 0
3 years ago
4 1/5 + 2 5/6 = ? <br><br> 6 1/6 <br> 6 1/30 <br> 7 1/4 <br> 7 1/30
grigory [225]

Answer:

7 1/30

Step-by-step explanation:

4 1/5 + 2 5/6

Get a common denominator of 30

4 1/4 = 4 1/5*6/6 = 4 6/30

2 5/6 *5/5 = 2 25/30

4 6/30 + 2 25/30

6 31/30

Rewriting

6 30/30 + 1/30

6 + 1 + 1/30

7 1/30

6 0
3 years ago
Read 2 more answers
Sheila bought burgers and fries for her children and some friends. the burgers cost $2.05 each and the fries are $.85 each. she
jeyben [28]
Let's have B stand for burgers, and F stand for fries.
2.05B+0.85F=$19.10  - This equation is set equal to total price.
B+F=14  - This equation is set equal to total number of items.
Subtract the F in the bottom equation.
B=14-F
Put this in place of B in the first equation.
2.05(14-F)+0.85F=19.10
Make sure you distribute the 2.05 properly, over both the 14 and the F.
28.7 - 2.05F+0.85F=19.10
Collect like terms for the F values.
28.7 - 1.2F=19.10
Subtract 28.7 from both sides.
-1.2F=-9.6
Divide by -1.2 on both sides.
F=8
Put this value in place of F in either equation.
B+8=14
B=6
So F=8 and B=6.
4 0
3 years ago
Which of the following is the correct factorization of the polynomial below?
Yuliya22 [10]
The answer is D. The polynomial is irreducible because 12 can’t be squared.
7 0
3 years ago
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