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Wewaii [24]
3 years ago
11

Cos(x/5)sin(x/5)=1/2[sin(2x/5) true or false

Mathematics
1 answer:
lukranit [14]3 years ago
6 0
Sin2x=2sinxcosx
sin2x/5=2sinx/5cosx/5
hence the nuber 2 multiply by cosx/5sinx/5 can be divided on the other side
hence its true
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The price of a sweater was reduced from $20 to $12. By what percentage was the price of the sweater reduced
kirill [66]

Answer:

The price was decreased by 40%

Step-by-step explanation:

Take the original price and subtract the new price

20-12 = 8

Divide by the original price

8/20 = .4

Change to a percent

40 %

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4 0
3 years ago
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What equation would help determine the cost of 4 markers if five markers are $6.55 and remember I am asking for the equation not
harkovskaia [24]

Answer:

4($6.55)/5

Step-by-step explanation:

If five markers cost $6.55

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4($6.55)/5

7 0
3 years ago
During a sale, a store offered a 20% discount on a TV that originally sold for $710. After the sale, the discounted price of the
Mademuasel [1]

Answer:

$681.60

Step-by-step explanation:

<u><em>Given:</em></u>

<em>During a sale, a store offered a 20% discount on a TV that originally sold for $710. After the sale, the discounted price of the TV was marked up by 20%</em>

<u><em>To Find:</em></u>

<em>What was the price of the TV after the markup? Round to the nearest cent.</em>

<u><em>Solution:</em></u>

$710 × (1 + 20%) × (1 - 20%)

$710 × 1.2 × (1-0.2)

$710 × 1.2 × 0.8

($710 × 1.2) × 0.8

852 × 0.8

= $681.60

<u><em>Kavinsky</em></u>

4 0
2 years ago
Can someone help with this
xenn [34]

Answer:

1/8^2, 1/2^4 and 1/3^5

Step-by-step explanation:

3 0
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Elena-2011 [213]

B 5 1/2

Hope it helped!!!

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3 years ago
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