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motikmotik
3 years ago
8

Please help with this question ​

Mathematics
1 answer:
zalisa [80]3 years ago
6 0

Answer:

4cm^2

Step-by-step explanation:

First we need to find the length of the height of the triangle using Pythagoras:

a^2+b^2=c^2 (Substitute in what we have)

a^2+3√2(^2)=2√5(^2)   =   a^2 + 18 = 20 -> 20-18=2 √2=BD

Now we can find the area:

AD+DC= 3√2 + √2 = 4√2 x √2 = 8/2 = 4

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3 years ago
At the city museum, child admission is $5.60 and adult admission is $9.60. On Thursday, 153 tickets were sold for a total sales
JulsSmile [24]

Answer:

95 child tickets

Step-by-step explanation:

a+c =153       c=( 153-a) you need to plug this for c

9.6a + 5.6(153-a) = 1088.8

9.6a + 856.8 - 5.6a = 1088.8

4a +856.8 = 1088.8

subtract 856.8 on both sides

4a = 232

a=58   (58 adults)

153 - 58 = 95 (95 children)

95*$ 5.6 =  $532

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$532 + $556.8 =$ 1088.8

7 0
3 years ago
The sum of three consecutive numbers is 84. Write and solve a math expression in terms of n for the smallest of the three number
bagirrra123 [75]

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Step-by-step explanation:

Let the three consecutive number be n-1 , n , n+1 .

Since , the sum of three consecutive numbers is 84.

\Rightarrow\ (n-1)+n+(n+1)=84

Remove parenthesis

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That means the three consecutive numbers would be (28-1) , 28 , (28+1)

i.e. 27 , 28 , 29.

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6 0
3 years ago
Read 2 more answers
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