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snow_tiger [21]
3 years ago
6

The length of a rectangle is 1m more than twice its width, and the area of the rectangle is 66m2. Find the dimensions of the rec

tangle.
Mathematics
1 answer:
Sergio039 [100]3 years ago
6 0
A = LW
A = 66
L = 2W + 1

66 = W(2W + 1)
66 = 2W^2 + W
2W^2 + W - 66 = 0
(2W - 11)(W + 6) = 0

2W - 11 = 0
2W = 11
W = 11/2
W = 5.5

W + 6 = 0
W = -6 (this is an extraneous solution...it will not work)

L = 2W + 1 = 2(5.5) + 1 = 12

so ur dimensions are : Length = 12m and width = 5.5m
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Number 3
sdas [7]

Answer: Choice A) 1990 to 1991

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Explanation:

Let's go through the answer choices one by one.

For choice A, we go from the year 1990 to 1991 which is a change of 1 year. The wage goes from 3.80 to 4.25 over this timespan, which is an increase of 4.25-3.80 = 0.45 dollars. Divide the change in wage (0.45 dollars) over the change in change in time (1 year) to get 0.45/1 = 0.45; this indicates that the wage increased by 0.45 dollars per year over the timespan 1990 to 1991

Now onto choice B. We have a wage increase of 3.80-3.35 = 0.45 over a course of 9 years (since 1990-1981 = 9) so 0.45/9 = 0.05 is the rate of wage growth, meaning that the wage bumps up by a nickel each year. So far choice A is the winner.

Moving onto choice C, we have a wage increase of 0.25 dollars (3.35-3.10 = 0.25) over an 1 year period (1981-1980 = 1) so the rate of change for this slice of time is 0.25/1 = 0.25 dollars per year. Choice A is still the winner.

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Answer:

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Step-by-step explanation:


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Answer:

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Step-by-step explanation:

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