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3 years ago

If $20.00 is for 12.25kg of peas ...what weight of peas can i get for $4.00

1 answer:

4 0

2.45kg

First you calculate the price per kg as follows:

If it’s $20 for 12.25 kg, the price per kg is $20/12.25=$1.63 per kg

If you have $4, you can figure out what weight you can get by taking $4/the price per kg, so $4/$1.63, which is 2.45 kg.

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Find the 52nd term of the arithmetic sequence ?

Gwar [14]

不完整的问题，对不起，伙计。

本题已由中国数学会官方解答（现有会员：2人）

3 0

2 years ago

Read 2 more answers

Please someone help me to prove this.

morpeh [17]

Answer: see proof below

Step-by-step explanation:

Use the Double Angle Identity: sin 2Ф = 2sinФ · cosФ

Use the Sum/Difference Identities:

sin(α + β) = sinα · cosβ + cosα · sinβ

cos(α - β) = cosα · cosβ + sinα · sinβ

Use the Unit circle to evaluate: sin45 = cos45 = √2/2

Use the Double Angle Identities: sin2Ф = 2sinФ · cosФ

Use the Pythagorean Identity: cos²Ф + sin²Ф = 1

Proof LHS → RHS

LHS: 2sin(45 + 2A) · cos(45 - 2A)

Sum/Difference: 2 (sin45·cos2A + cos45·sin2A) (cos45·cos2A + sin45·sin2A)

Unit Circle: 2[(√2/2)cos2A + (√2/2)sin2A][(√2/2)cos2A +(√2/2)·sin2A)]

Expand: 2[(1/2)cos²2A + cos2A·sin2A + (1/2)sin²2A]

Distribute: cos²2A + 2cos2A·sin2A + sin²2A

Pythagorean Identity: 1 + 2cos2A·sin2A

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LHS = RHS: 1 + sin4A = 1 + sin4A $\checkmark$

6 0

2 years ago

What is the simplest form of this expression?

Dimas [21]

Answer:

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Remove the bracket

= 4-m-1-5

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3 years ago

The speed of a stream is 2 mph. A boat travels 4 miles upstream in the same time it takes to travel 8 miles downstream. What is

Amanda [17]

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3 years ago

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Nady [450]

August would be the correct answer.
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3 0

2 years ago

If $20.00 is for 12.25kg of peas ...what weight of peas can i get for $4.00​

If $20.00 is for 12.25kg of peas ...what weight of peas can i get for $4.00