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3 years ago

How to solve this question????? Help me please

Mathematics

1 answer:

julsineya [31]3 years ago

7 0

Answer: 24/10

Answer: 24/10Step-by-step explanation:

1) 1*1÷10 +1*1÷5+2÷20

2)(1*10+1)/10+(1*5+1)/5+2/20 3)11/10+6/5+2/20

4)11/10+6/5+1/10

5)11/10+12/10+1/10

6)(11+12+1)/10

7)24/10

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(help) what type of triangle is shown below

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3 years ago

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4 years ago

Use 3.14 for PI( π ) Diameter: 5 ft Formula: A= πr2

Liula [17]

Answer:

$\boxed {\boxed {\sf 19.625 \ ft^2}}$

Step-by-step explanation:

The area of a circle is found using this formula:

$a= \pi r^2$

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$a= (3.14)* (2.5 \ ft)^2$

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Multiply.

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The area of the circle is 19.625 square feet.

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3 years ago

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olya-2409 [2.1K]

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3 years ago

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Inessa05 [86]

Hello :
all n in N ; n(n+1)(n+2) = 3a a in N or : ≡ 0 (mod 3)
1 ) n ≡ 0 ( mod 3)...(1)

n+1 ≡ 1 ( mod 3)...(2)
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by (1), (2), (3) : n(n+1)(n+2) ≡ 0×1×2 ( mod 3) : ≡ 0 (mod 3)
2) n ≡ 1 ( mod 3)...(1)

n+1 ≡ 2 ( mod 3)...(2)
 n+2 ≡ 3 ( mod 3)...(3)
by (1), (2), (3) : n(n+1)(n+2) ≡ 1×2 × 3 ( mod 3) : ≡ 0 (mod 3) , 6≡ 0 (mod)
3) n ≡ 2 ( mod 3)...(1)

n+1 ≡ 3 ( mod 3)...(2)
 n+2 ≡ 4 ( mod 3)...(3)
by (1), (2), (3) : n(n+1)(n+2) ≡ 2×3 × 4 ( mod 3) : ≡ 0 (mod 3) , 24≡ 0 (mod3)

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3 years ago