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Alik [6]
2 years ago
11

(please explain clearly, I am very tired) Find the surface area of the composite figure.

Mathematics
1 answer:
Y_Kistochka [10]2 years ago
8 0

Answer:

644

Step-by-step explanation:

SA=[2×(5×20 + 5×6 + 20×6)] +

[2×(4×12 + 4×6 + 12×6)] -

[ 2× 12×6]

= [2×(250)]+[2×(144)] - [144]

= 500+288-144

= 644 cm²

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Two sides of a triangle have lengths 18cm and 40cm describe the possible lengths of the third side
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Answer:

Step-by-step explanation:

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3 years ago
2/3(3y+6)=0 Please help! One solution, No solution, or Many solutions? Please answer by 3:35, September 4, 2020
Serjik [45]

Answer:

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Step-by-step explanation:

2/3(3y+6)=0

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6 0
3 years ago
Which property can be used to show that if 3a = 4b, then 4b = 3a?
ycow [4]

Step-by-step explanation:commutative property

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4 0
2 years ago
Read 2 more answers
Help me pls it’s urgent
earnstyle [38]

Answer:

<A = 115

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Step-by-step explanation:

<A + <B + <C = 180

SO

(4X -13) +15 +(X+18) =180

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5X = 160

X= 32

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<C = 32+18 = 50

3 0
3 years ago
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Rasek [7]
They are all (SAS)side angle side except for the bottom right one. This is because the question does not give the little ticks to show that one side is the same as the other. It is not good enough to assume they are congruent without proof.
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