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LenaWriter [7]
3 years ago
11

A parallelogram has an area of x2 + 9x - 36.

Mathematics
1 answer:
malfutka [58]3 years ago
5 0

Answer:

Step-by-step explanation:

Please use " ^ " to indicate exponentiation:

A = x^2 + 9x - 36.  This factors into A = (x + 12)(x - 3).  We can assume that the length of the parallelogram is x + 12 and that the width is x - 3.

Note that if x = 3 the area becomes zero.  So:  x must be greater than 3, so that the (x - 3) factor is positive.

Example:  If x = 4, then the dimensions of the parallelogram are 4 + 12, or 16, and 4 - 3, or 1.  

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NikAS [45]
Let x = the amount of time that the third person needs to work on the job to add up to one

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1 - 1/2 - 1/3 = x

To subtract the fractions we need to put them all over a common denominator. Let's use 3*2 = 6 as the denominator; so 1 = 6/6, 1/2 = 3/6, 1/3 = 2/6:

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3 0
4 years ago
Decompose 3/8 as the sum of unit fractions
bearhunter [10]
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3 years ago
5#The distribution of scores on a standardized aptitude test is approximately normal with a mean of 480 and a standard deviation
kirza4 [7]

We want to find the value that makes

P(X\ge x)=0.2

To find it we must look at the standard normal table, using the complementary cumulative table we find that

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\begin{gathered} 0.84=\frac{x-480}{105} \\  \\ x=0.84\cdot105+480 \\  \\ x=568.2 \end{gathered}

Rounding to the nearest integer the minimum score needed is 568, if you get 568 you are at the top 20.1%.

7 0
1 year ago
I WILL GIVE BRAINLIEST FOR RIGHT ANSWER
Talja [164]

Answer:

The answer is 1.5

Step-by-step explanation:

4 0
3 years ago
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Step-by-step explanation:

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