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ElenaW [278]
3 years ago
8

The width of a rectangle measures (6.9a+8.5)(6.9a+8.5) centimeters, and its length measures (3.8a+9.8)(3.8a+9.8) centimeters. Wh

ich expression represents the perimeter, in centimeters, of the rectangle?
Mathematics
1 answer:
Colt1911 [192]3 years ago
5 0

Answer:

P = (21.4a+36.6) cm

Step-by-step explanation:

Given that,

The width of a rectangle, b = (6.9a+8.5) cm

The length of a rectangle, l = (3.8a+9.8) cm

We need to find the perimeter of the rectangle. Perimeter is the sum of all sides. So,

P = 2(l+b)

Put all the values,

P = 2(6.9a+8.5+3.8a+9.8)

= 2(6.9a+3.8a+8.5+9.8)

= 2(10.7 a+18.3)

= (21.4a+36.6)

So, the perimeter of the rectangle is (21.4a+36.6) cm.

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What are the weights (in Newton’s) for the given masses 22.1,33.5,41.3,59.2,78
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Answer:

1. 216.8 N

2.328.635 N

3. 405.153 N

4. 580.752 N

5. 765.18 N

Step-by-step explanation:

1. Let the mass is 22.1 kg, then the weight in Newton will be (22.1 × 9.81) = 216.8 N {Where acceleration due to gravity is 9.81 m/sec²}

2. Let the mass is 33.5 kg, then the weight in Newton will be (33.5 × 9.81) = 328.635 N {Where acceleration due to gravity is 9.81 m/sec²}

3. Let the mass is 41.3 kg, then the weight in Newton will be (41.3 × 9.81) = 405.153 N {Where acceleration due to gravity is 9.81 m/sec²}

4. Let the mass is 59.2 kg, then the weight in Newton will be (59.2 × 9.81) = 580.752 N {Where acceleration due to gravity is 9.81 m/sec²}

5. Let the mass is 78 kg, then the weight in Newton will be (78 × 9.81) = 765.18 N {Where acceleration due to gravity is 9.81 m/sec²}

(Answer)

4 0
3 years ago
Someone help and please make sure it’s right
Scorpion4ik [409]
Answer: 9
5x+5=6x-4 and you just solve it, the solution will be 9
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3 years ago
Which of the following can not be used on a matrix when solving a system of equations?
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Answer:

Option (c) is correct.

Add a constant to a row does not involves while solving a system of equations using matrix.

Step-by-step explanation:

Given : solving a system of equations.

W have to choose from given options that can not be used on a matrix when solving a system of equations.

Since solving the system using matrix method involve

1)  adding of rows,

2) multiplying a row by a constant.

3)  interchange rows

But  add a constant to a row does not involves while solving a system of equations using matrix.

Thus, Option (c) is correct.

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4 years ago
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100 (1 + 0.1)^8

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Answer

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