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3 years ago

The price of an item has risen to $184 today. Yesterday it was $80. Find the percentage increase.

Mathematics

1 answer:

Alchen [17]3 years ago

4 0

130% because if 80 =100% you take way 80 fro 184 to get 104 and get the % of that

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3.1.10

TiliK225 [7]

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3 years ago

If cosA+sinA=√2, then prove A=45°.

Lyrx [107]

Answer:

1/2 now substitute 45 degrees

Step-by-step explanation:

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2 years ago

shape ABCDEF is an irregular hexagon. prove that the sum of the shape is720 degrees. show ur working. (3marks)

guajiro [1.7K]

Answer:

Here's one way to do it

Step-by-step explanation:

Divide the hexagon into triangles, for example, as in the diagram below.

The triangles are all inside the hexagon, so the sum of their interior angles is the sum of those of the hexagon.

The sum of the interior angles of a triangle is 180°.

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3 years ago

2p - 3q - 4r + 6r -2q + p

sergejj [24]

2p - 3q - 4r + 6r - 2q + p = 0

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7 0

3 years ago

Beginning one month after birth of their son, Noah, the Nelsons deposited $100 each month in an annuity for his college fund. Th

gizmo_the_mogwai [7]

Answer:

$100 * (1 + 6.8%/12)^216 + $100*(1+6.8%/12)^215 + ... + $100*(1+6.8%/12)^1

Now note that

x + x^2 + x^3 + ... + x^N = x ( 1 + x + ... + x^(N-1) )

= x ( (x^N -1)/(x-1) )

Here, x = 1+6.8%1 = 1.00566666 and N = 216, so

$100 * ( 1.00566666 ( 1.00566666^216 -1) / 0.00566666 )

= $ 42398.33

The total interest earned is $42,398 - $21,600 = $20,798

Step-by-step explanation:

The generic formula used in this compound interest calculator is V = P(1+r/n)^(nt)

V = the future value of the investment

P = the principal investment amount

r = the annual interest rate

n = the number of times that interest is compounded per year

t = the number of years the money is invested for

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3 years ago