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Bumek [7]
3 years ago
15

Calculate the total surface area of the rectangular prism

Mathematics
2 answers:
jeka57 [31]3 years ago
5 0

Answer:

170.3cm^2

Step-by-step explanation:

The total surface area is the sum of surfaces of all sides.

We have 2 sides of 7.9cmx4.5cm, 2 sides of 7.9cmx4cm, and 2 sides of 4.5cm*4cm.

7.9cm*4.5cm = 35.55cm^2

7.9cm*4cm = 31.6cm^2

4.5cm*4cm = 18cm^2

2 * (35.55cm^2 + 31.6cm^2 + 18cm^2) = 2 * 85.15cm^2 = 170.3cm^2

sweet [91]3 years ago
4 0

Answer: C. 170.3 cm squared

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no

Step-by-step explanation:


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3 years ago
Explain how you know which method you should use to solve a rational equation.
notsponge [240]

<u>Methods to solve rational equation:</u>

Rational equation:

A rational equation is an equation containing at least one rational expression.

Method 1:

The method for solving rational equations is to rewrite the rational expressions in terms of a common denominator. Then, since we know the numerators are equal, we can solve for the variable.

For example,

\frac{1}{2}=\frac{x}{2}\Rightarrow x=1

This can be used for rational equations with polynomials too.

For example,

\frac{1+x}{x-3}=\frac{4}{x-3}\Rightarrow(1+x)=4 \Rightarrow x=3

When the terms in a rational equation have unlike denominators, solving the equation will be as follows

\frac{x+2}{8}=\frac{3}{4}

\Rightarrow\frac{x+2}{1}=\frac{3\times8}{4}\Rightarrow{x+2}=2\times3

\Rightarrow{x+2}=6\Rightarrow x=6-2\Rightarrow x=4

Method 2:

Another way of solving the above equation is by finding least common denominator (LCD)

\frac{x+2}{8}=\frac{3}{4}

Factors of 4: 1\times2\times2

Factors of 8: 1\times2\times2\times2

The LCD of 4 and 8 is 8. So, we have to make the right hand side denominator as 8. This is done by the following step,

\Rightarrow\frac{x+2}{8}=\frac{3}{4}\times{2}{2}

we get,

\Rightarrow\frac{x+2}{8}=\frac{6}{8}

On cancelling 8 on both sides we get,

\Rightarrow(x+2)=6\rightarrow x=6-2\rightarrow x=4

Hence, these are the ways to solve a rational equation.

7 0
3 years ago
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To find the side lengths, you have to factor 4x^2 + 28x + 49. This equation factored is (2x+7)(2x+7), so each side length is (2x+7) feet.
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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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