A rectangular garden has length and width as given by the expressions below.

Mathematics

1 answer:

anyanavicka [17]3 years ago

6 0

Answer:

(8 - 42x - 56y -12xy) is you're answer.

Step-by-step explanation:

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The length of a rectangle is 3 feet more than twice the width. The perimeter is 128 feet. Find the length and width.

iragen [17]

We are going to consider a rectangle with length called "a" and width "b" Then we know that perimeter is the sum of both sides 2*a + 2*b = 128 And also the following equation given by the question: a = 2*b + 3 So solving the first equation: 2*(2*b+3) + 2*b = 128 4*b+6+2*b=128 6*b = 122 b = 122/6 = 61/3 Then a=2*122/6+3 = 244/6+3 = 262/6 = 131/3 Solution: Length = 131/3 Width = 61/3

7 0

2 years ago

The life span of a battery is the amount of time the battery will last. The distribution of life span for a certain type of batt

slavikrds [6]

Answer:

0.0548

Step-by-step explanation:

The distribution of life span for a certain type of battery is approximately normal with mean 2.5 hours and standard deviation 0.25 hour.

To find the the probability that a selected battery will have a life span of at most 2.1 hours, we need to first determine the z-score for x=2.1 hours using

$z = \frac{x - \mu}{ \sigma}$