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Lesechka [4]
2 years ago
13

Help we don’t know the answer

Mathematics
1 answer:
kvv77 [185]2 years ago
8 0
Hey I don’t get this
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A rectangle with an area of 81 cm² has a length that is 3 times the width. How long is the width of the rectangle? Round to the
LenaWriter [7]

Answer:

W ≈ 5.2 cm

Step-by-step explanation:

Represent the length and width by L and W respectively.

Then L * W = 81 cm^2, and L = 3W.

Substituting 3W for L in the first equation, we get:

3W * W - 81 = 0, or 3W^2 - 81 = 0.

To make it easier to find the final answer, rewrite 3W^2 - 81 = 0 as

            81

W^2 = ------- = 27

              3

Then W (the width) is the positive square root of 27, or W ≈ 5.2 cm

3 0
2 years ago
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Which is the graph of a quadratic equation that has a negative discriminant?
luda_lava [24]

Answer:

The first graph.

Step-by-step explanation:

When there is a negative discriminant, we call this "no solution" or "no real solution" because there are no x-intercepts. In the first graph, there are no x-intercepts.

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3 years ago
Which of the following best explains how a sea breeze develops?
Damm [24]

Answer:what you need to do is eat a cracker between someones toes

Step-by-step explanation:

IT GIVES YOU MONEY

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2 years ago
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32.48x12.56 please help my day show her work
Alekssandra [29.7K]
The answer would be 4,060,952

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3 years ago
Ava is driving home from college this winter holiday. She travels 60 miles during the 1st hour of her trip. If she continues at
Sladkaya [172]

Answer: 5.5 hours

Step-by-step explanation:

distance/speed = time

330/60 = 5.5

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