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irinina [24]
3 years ago
13

The length of a rectangle is 10 cm more than 3 times the width. The perimeter is 180. What are the dimensions?​

Mathematics
1 answer:
Elden [556K]3 years ago
3 0
Let’s take the width as ‘w’
Length = 10 + 3w

Perimeter = 2l + 2w
2 (10 + 3w) + 2w = 180
20 + 6w + 2w = 180
20 + 8w = 180
8w = 180-20
8w= 160
w= 20

Dimensions:
Width = 20 cm
Lengths = (10+3w) = 70 cm
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Answer:

  50 beats per minute

Step-by-step explanation:

10 bpm = 0.20 × (normal heart rate) . . . . . . . . . . . . 10 bpm is 20% of normal

(10 bpm)/0.20 = (normal heart rate) = 50 bpm . . . . . divide by the coefficient of the variable

The bear's normal heart rate is 50 beats per minute.

6 0
4 years ago
the difference of two numbers is 20 the larger of the two number is 2 more than twice the smaller. what are the two numbers?
faltersainse [42]

Answer:

x = 38

x = 18

Step-by-step explanation:

Let one number = x

Let the second number = y

x - y = 20

x must be the larger of the two numbers

x = 2y + 2                               Put this equation into the equation above

2y + 2 - y = 20                       Combine

y + 2 = 20                              Subtract 2 from both sides

y = 20 - 2

y = 18

x - 18 = 20                            Add 18 to both sides

x = 38

 

7 0
3 years ago
What is the answer for 5(2q+8)+12q-6=???
lord [1]

Answer:

56q

Step-by-step explanation:

FIRST, you add 2q and 8.

2q+8=10q

THEN you multiply 10q by 5.

10q*5=50q

NOW add 50q to 12.

50q+12=62q

AND THEN subtract 6.

62q-6=56q

5(2q+8)+12q-6=56q

6 0
3 years ago
Steps for sloving 6(4x-3)=30 are shown
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Answer:

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4 0
3 years ago
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ruslelena [56]
Round pan volume is:
3.14•r^2•h
D=7 so r=3.5 in
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Rec. pan vol. is :
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Rec. Pan is larger because 108 in^3 is > 76.97 in^3 :) .

The icing that will be needed to frost the round cake pan is:
We need to find the surface area:
S.A= 3.14r^2 + 2 • 3.14•r • h .... 3.14 is the value of PI
So, S.A= 3.14• 3.5^2 + 6.28• 3.5• 2= 82.47 in^2 the icing that'll be needed to frost the round cake pan.

Icing that will be needed for the rec. cake pan is:

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S.A= 156 in^2 the icing needed to frost the rec. cake pan .... the S.A of all sides except the bottom one :).

Good luck ;-)

8 0
3 years ago
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