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3 years ago

From 83 to 46 percent change

Mathematics

1 answer:

worty [1.4K]3 years ago

5 0

Answer:

-44.58%

Step-by-step explanation:

If I spent $83 on a coat and the next week found it for $46, how much did it change? Well 83-46 is $37 and is -$37 because that's how much money I lost. To find the percent change we divide the difference of -37 by the total 83.

-37/83= - 0.44578

To convert from a decimal to a percent, I multiply by 100.

-0.44578(100)= -44.58 rounded.

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What two number multiply to negative 20 and add to 19

OLEGan [10]

$x;\ y-the\ numbers\\\\ \left\{\begin{array}{ccc}xy=-20\\x+y=19&\Rightarrow&x=19-y\end{array}\right\\\\subtitute\ to\ first\ equation:\\\\(19-y)y=-20\\19y-y^2+20=0\\-y^2+19y+20=0\ \ \ |change\ signs\\y^2-19y-20=0\\y^2-20y+y-20=0\\y(y-20)+1(y-20)+0\\(y-20)(y+1)=0\iff y-20=0\ or\ y+1=0\\\\y=20\ or\ y=-1$

$x=19-y\\\\for\ y=20\Rightarrow x=19-20=-1\\\\for\ y=-1\Rightarrow x=19-(-1)=20\\\\Answer:\boxed{\boxed{20\ and\ -1}}$

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4 years ago

What is the value of the expression |1-7| + |-4/?

Brut [27]

Answer:

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Step-by-step explanation:

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4 years ago

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You want to buy a new Apple Watch. It costs $279.00, but you have to pay 6% sales tax. How much will the watch cost you with tax

Mazyrski [523]

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Step-by-step explanation:

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4 years ago

What is 15 cm/year converted to inches per month? Round to the nearest tenth.

topjm [15]

Answer:

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Step-by-step explanation:

There are nearly 0.3937 inches in 1 cm, so

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4 years ago

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shutvik [7]

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3 years ago