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Sliva [168]
4 years ago
15

What is the answer to this question please show work

Mathematics
2 answers:
larisa86 [58]4 years ago
7 0
Hey there!

To get the area of this compound shape, let's divide this shape into two parts. After you do that, we have a square and a triangle. Let's solve for the square first.

The square has dimensions of 12 cm for each side. Thus, we just square the side length to get the area.

12^2=144

Thus, the square has an area of 144 cm². Now, let's find the area of the triangle.

We know that the triangle has a base length of 12 cm, but the height is not directly given. To find the height, subtract 12 from 17.

17-12=5

Now, use the formula for the area of the triangle.

\frac{1}{2}bh= \frac{1}{2}5*12=30

The triangle has an area of 30 cm². Now, add the area of the triangle and the square.

144+30=174

The compound figure has an area of 174 cm².

Hope this helps! :)
Artemon [7]4 years ago
3 0
The image contains two geometric objects, square and triangle

The square
The square has side equals to 12 cm
Find the area of the square
a = s × s
a = 12 × 12
a = 144 cm²

The triangle
The triangle has base equals to 12 cm, and the height equals to 17 - 12 = 5 cm
Find the area of the triangle
a = 1/2 × b × h
a = 1/2 × 12 × 5
a = 1/2 × 60
a = 30 cm²

Now add the area together
a = area of triangle + area of square
a = 144 + 30
a = 174

Answer:
The area is 174 cm²
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Step-by-step explanation:

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                 f(x) = \frac{x}{2} + 5

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                f(2) = \frac{2}{2} + 5 = 1 +5 = 6

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Root 3 minus root 2 divided by root 3 + root 2​
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Answer:

5 - 2 \sqrt{6}

Step-by-step explanation:

Perhaps you are interested in rationalising the denominator of the given problem. Let's do it.

\frac{ \sqrt{3} -  \sqrt{2}  }{ \sqrt{3} +  \sqrt{2}  }  \\  \\ multiplying \: numerator \: and \: denominator \:  \\ by \: (\sqrt{3} -  \sqrt{2}) \\  \\  \frac{( \sqrt{3} -  \sqrt{2} ) }{ (\sqrt{3} +  \sqrt{2}  )}  \times  \frac{ (\sqrt{3} -  \sqrt{2}  )}{ (\sqrt{3}  -   \sqrt{2}  )}  \\  \\  =   \frac{{( \sqrt{3}  -  \sqrt{2} )}^{2} }{ { (\sqrt{3} })^{2}  -  {(  \sqrt{2} })^{2} }  \\  \\  =  \frac{ { (\sqrt{3} )}^{2} +   { (\sqrt{2} )}^{2}   - 2 \sqrt{3 \times 2}  }{3 - 2}  \\  \\  =  \frac{3 + 2 - 2 \sqrt{6} }{1}  \\  \\  = 5 - 2 \sqrt{6}

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3 years ago
In a survey of 90 students 20 choose rock.40 chose hip hop 30 chose country. In a school of 360 students how many would be expec
lina2011 [118]

Answer:

The students would be expected to choose rock be<u> 80</u> or students choose hip hop be <u>160</u> or choose to country be <u>120</u>.

Step-by-step explanation:

Given:

In a survey of 90 students 20 choose rock, 40 choose hip hop and 30 choose country.

Now, to find the students expected to choose hip hop or rock or country in a school of 360 students.

Let the number of students expected to choose rock be x.

Let the number of students expected to choose hip hop be y.

Let the number of students expected to choose country be z.

Total number of students = 360.

Now, to get the number of students choosing hip hop or rock or country by using cross multiplication method:

In a survey of 90 students 20 choose rock.

So, 90 is equivalent to 20.

Thus, 360 is equivalent to x.

\frac{90}{20} =\frac{360}{x} \\\\By\ cross\ multiplying\ we\ get:\\\\90x=7200\\\\Dividing\ both\ sides\ by\ 90\ we\ get:\\\\x=80.

<u><em>Thus, the number of students expected to choose rock is 80.</em></u>

Now,

In a survey of 90 students 40 choose hip hop.

So, 90 is equivalent to 40.

Thus, 360 is equivalent to y.

\frac{90}{40} =\frac{360}{y} \\\\By\ cross\ multiplying\ we\ get:\\\\90y=14400\\\\Dividing\ both\ sides\ by\ 90\ we\ get:\\\\y=160.

<u><em>Therefore, 160 students expected to choose hip hop.</em></u>

And,

In a survey of 90 students 30 choose country.

So, 90 is equivalent to 30.

Thus, 360 is equivalent to y.

\frac{90}{30} =\frac{360}{z} \\\\By\ cross\ multiplying\ we\ get:\\\\90x=10800\\\\Dividing\ both\ sides\ by\ 90\ we\ get:\\\\x=120.

<u><em>Hence, 120 students expected to choose country.</em></u>

Therefore, the students would be expected to choose rock be 80 or students choose hip hop be 160 or choose to country be 120.

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