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myrzilka [38]
3 years ago
14

The length of a rectangle in centimeters is two more than thrice its width. a) Write an expression, in the simplest form, for th

e perimeter of the rectangle. b) Find the length of the rectangle if the perimeter is 36 cm
Mathematics
1 answer:
Karo-lina-s [1.5K]3 years ago
3 0

Answer:

Perimeter of the rectangle = 8 x +4

Length of the rectangle = 12 units.

Step-by-step explanation:

Let the width of the rectangle as 'x' units.

So, length of the rectangle is 2 more than 3 x.

We can set up expression for length as 3 x+2.

Now, perimeter is sum of all side lengths of the rectangle.

So, perimeter = x+x+3 x+2 +3 x+2

Combine like terms,

Perimeter = 8 x+4

Now, it is given perimeter is 36cm

So,

8 x+4=36

Subtract both sides 4

8 x=32

Divide both sides by 8

x=4

So, width of the rectangle =4

Length =3(4) +2=14

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Answer:

X = 3

Step-by-step explanation:

First count the amount of X's. There are 5 and it is plus two. Both sides should be equal in value so you have to set up your equation.

5x + 2 = 17

Then Solve For X

5x + 2 = 17

Subtract 2 from both sides

5x = 15

Divide by 5

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Check your answer

5(3) +2 = 17

15 + 2 = 17

17 = 17

It is correct!

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3 years ago
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No for example a regular octagon (8 sides) is symmetrical
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Solve each system of equation for 3y+x=3 and -2y+5x=15
madam [21]

Answer:

<em>x = 3 and y = 0</em>

Step-by-step explanation:

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6 0
3 years ago
For what values of x will the function f(x) = 3x² + 13x - 10 equal zero?
Oduvanchick [21]

Answer:

x = - 5 , x = \frac{2}{3}

Step-by-step explanation:

the values of x that make f(x) zero are the zeros

to find the zeros let f(x) = 0 , that is

3x² + 13x - 10 = 0

consider the factors of the product of  the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term.

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use these factors to split the x- term

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3x(x + 5) - 2(x + 5) = 0 ← factor out (x + 5) from each term

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2 years ago
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