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Jobisdone [24]
3 years ago
14

F(x) = 2x2 – 4x – 3

Mathematics
2 answers:
Elanso [62]3 years ago
7 0
Mica should have added 2 to 3 instead of 1
monitta3 years ago
3 0

Answer:

Mica should have added 2 to 3 instead of 1.

Step-by-step explanation:

f(x) = 2x^2 – 4x – 3

0 = 2x^2 – 4x – 3

Mica added 3 on boths sides and factored out 2

3 = 2(x^2 – 2x)

We have 2 outside the parenthesis , so we multiply 1 with 2  and add it one left side

3 + 1 = 2(x^2 – 2x + 1) Error in this step

The above step becomes 3 + 2 = 2(x^2 – 2x + 1)

Mica should have added 2 to 3 instead of 1.

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The answer is A because there are only acute angles
3 0
3 years ago
The length of a rectangle is 9.7cm more then 4 times the width. If the perimeter of the rectangle is 91.4cm, what are the dimens
Ksju [112]
The dimensions are Width of the rectangle = 7.2 cm
Length of the rectangle = 4x + 9.7
                                      = 28.8 + 9.7
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4 0
3 years ago
A scale drawing of a rectangular park is 5 inches wide and 7 inches long. The actual park length is 280 yards. What is the width
Anastaziya [24]

Answer:

56,000

Step-by-step explanation:

7 inches → 280 yards

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3 0
3 years ago
Read 2 more answers
Consider a sample with a mean of 30 and a standard deviation of 5. Use chebyshev's theorem to determine the percentage of data w
RSB [31]

With the help of Chebyshev's theorem, the percentage of data between 5 to 45 is 89%.

<h3>What is Chebyshev's theorem?</h3>

The minimum percentage of observations that are within a given range of standard deviations from the mean is calculated using Chebyshev's Theorem.

Numerous other probability distributions can be applied to this theorem.

Chebyshev's Inequality is another name for Chebyshev's Theorem.

One of many theorems established by Russian mathematician Pafnuty Chebyshev is known as Chebyshev's theorem.

According to Bertrand's postulate, there is a prime between n and 2n for every n.

So, the percentage of data within 15 to 45 is:

In this instance, we're looking for numbers between 15 and 45.

Since 30 -3*5 = 20 and 30 + 3*5 = 45, we are therefore within 3 deviations of the mean. So, since k = 3, we can find the percent as follows:

% = (1 - 1/3²) × 100 = 88.88% = 89%

Therefore, with the help of Chebyshev's theorem, the percentage of data between 5 to 45 is 89%.

Know more about Chebyshev's theorem here:

brainly.com/question/28482338

#SPJ4

5 0
1 year ago
ESTIMATE THE QUOTIENT (Use rounding): 59.67 ÷ 11.1 =
jasenka [17]

Answer:

59.67 rounds to 60, 11.1 rounds to 10, so 60 divided y 10 equals 6

Step-by-step explanation:

hope this helps

6 0
3 years ago
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