Homework Answers
x2 + 2x - 20 = 0
The solutions of a quadratic equation ax2 + bx + c = 0 is given by
x = (-b sqrt(b2
- 4ac)) / 2a
In this case, a = 1, b = 2 , c = -20
Therefore, solutions of x are
x = (-b sqrt(b2
- 4ac)) / 2a
= (-2
sqrt((2)2 - 4(1)(-20))) / 2(1)
= (-2 sqrt(84) / 2
= (-2 2sqrt(21) / 2
= -1 sqrt(21)
= -1 + sqrt(21) , -1 - sqrt(21)
=> x = 3.583, -5.583
Therefore,
A = -5.583
B = 3.583
Consider the function f(x) = ** - 50x? +4, -45« s 11. This function has an...
Consider the function f(x) = ** - 50x? +4, -45« s 11. This function has an absolute minimum value equal to Preview and an absolute maximum value equal to Preview Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2-3,5+4) Enter DNE for Does Not Exist, oo for Infinity Box 2: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4) Enter DNE...
Letter C?? Data were collected from a survey given to graduating college seniors on the number...
Letter C??
Data were collected from a survey given to graduating college seniors on the number of times they had changed majors. From that data, a probability distribution was constructed. The random variable X is defined as the number of times a graduating senior changed majors. It is shown below: P(X = ?) 0.18 0.276 0.228 0.193 0.068 0.038 0.013 0.003 0.001 a. What is the probability that a randomly selected student changed his or her major at least once?...
Probability Scores 0.2 3 0.05 4 0.05 7 0.1 8 0.2 9 0.1 10 0.3 12...
Probability Scores 0.2 3 0.05 4 0.05 7 0.1 8 0.2 9 0.1 10 0.3 12 Preview Find the expected value of the above random variable. Get help: Video Box 1: Enter your answer Enter DNE for Does Not Exist, as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2/3, 5+4) oo for Infinity Probability Scores 0.25 0 0.15 9 0.3 11 0.1 13 0.2 14 Preview Find the expected value of the above random variable....
parta- Use linear approximation, i.e. the tangent line, to approximate as follows:Let f(x) = x 6. The equation of the...
parta-
Use linear approximation, i.e. the tangent line, to
approximate as follows:Let f(x) = x 6.
The equation of the tangent line to f(x) at x = 2 can be written
in the form y = mx+b
where
is:
and where
is:
Using this, we find our approximation for 1.86is
Box 1: Enter your answer as a number (like 5, -3, 2.2) or as a
calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity
Box...
A high school baseball player has a 0.191 batting average. In one game, he gets 8...
A high school baseball player has a 0.191 batting average. In one game, he gets 8 at bats. What is the probability he will get at least 6 hits in the game? Box 1: Enter your answer as an integer or decimal number. Examples: 3, 4, 5.5172 Enter DNE for Does Not Exist, oo for Infinity Submit License Question 14. Points possible: 1 Unlimited attempts. If a seed is planted, it has a 70% chance of growing into a healthy...
Find, or approximate to two decimal places, the described area. – x2 + 10x – 5...
Find, or approximate to two decimal places, the described area. – x2 + 10x – 5 and g(x) =e 0.53 , and the lines x = 4 and The area bounded by the functions f(x) X = 7. Preview TIP Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4) Enter DNE for Does Not Exist, oo for Infinity
Giving a test to a group of students, the grades and gender are summarized below А...
Giving a test to a group of students, the grades and gender are summarized below А B с Total 8 9 10 Male Female Total 4 12 3 12 13 23 27 20 47 If one student is chosen at random, Find the probability that the student was male AND got a "B". Preview Get help: Video Box 1: Enter your answer as a number (like 5,-3, 2.2172) or as a calculation (like 5/3, 213,5+- Enter DNE for Does Not...
Use the spinner below. P(multiple of 2) = Box 1: Enter your answer as a number...
Use the spinner below. P(multiple of 2) = Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4) Enter DNE for Does Not Exist, oo for Infinity
Use a ratio identity to find cot 0 if sin0 = - and cos 0 =...
Use a ratio identity to find cot 0 if sin0 = - and cos 0 = coto Preview TIP Enter your answer as a number (like 5.-3.2.2172) or as a calculation (like 5 243, 5+4) Enter DNE for Does Not Exist, oo for Infinity Points possible: 3 This is attempt 1 of 2. Submit
Is x - 4 a factor of * -8.73 4.x² + 8x - 6722 Select an...
Is x - 4 a factor of * -8.73 4.x² + 8x - 6722 Select an answer The remainder when you divide is Box 1: Select the best answer Box 2: Enter your answer as an integer or decimal number. Examples: 3, 4, 5.5172 Enter DNE for Does Not Exist, oo for Infinity Find all zeros of f(x) = 923 - 12.2 - 83 - 8. Enter the terms separated by commas. Enter exact value, not decimal approximations. Preview Box...
Consider the function f(x) = ** - 50x? +4, -45« s 11. This function has an absolute minimum value equal to Preview and an absolute maximum value equal to Preview Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2-3,5+4) Enter DNE for Does Not Exist, oo for Infinity Box 2: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4) Enter DNE...
Letter C??
Data were collected from a survey given to graduating college seniors on the number of times they had changed majors. From that data, a probability distribution was constructed. The random variable X is defined as the number of times a graduating senior changed majors. It is shown below: P(X = ?) 0.18 0.276 0.228 0.193 0.068 0.038 0.013 0.003 0.001 a. What is the probability that a randomly selected student changed his or her major at least once?...
Probability Scores 0.2 3 0.05 4 0.05 7 0.1 8 0.2 9 0.1 10 0.3 12 Preview Find the expected value of the above random variable. Get help: Video Box 1: Enter your answer Enter DNE for Does Not Exist, as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2/3, 5+4) oo for Infinity Probability Scores 0.25 0 0.15 9 0.3 11 0.1 13 0.2 14 Preview Find the expected value of the above random variable....
parta-
Use linear approximation, i.e. the tangent line, to
approximate as follows:Let f(x) = x 6.
The equation of the tangent line to f(x) at x = 2 can be written
in the form y = mx+b
where
is:
and where
is:
Using this, we find our approximation for 1.86is
Box 1: Enter your answer as a number (like 5, -3, 2.2) or as a
calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity
Box...
A high school baseball player has a 0.191 batting average. In one game, he gets 8 at bats. What is the probability he will get at least 6 hits in the game? Box 1: Enter your answer as an integer or decimal number. Examples: 3, 4, 5.5172 Enter DNE for Does Not Exist, oo for Infinity Submit License Question 14. Points possible: 1 Unlimited attempts. If a seed is planted, it has a 70% chance of growing into a healthy...
Find, or approximate to two decimal places, the described area. – x2 + 10x – 5 and g(x) =e 0.53 , and the lines x = 4 and The area bounded by the functions f(x) X = 7. Preview TIP Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4) Enter DNE for Does Not Exist, oo for Infinity
Giving a test to a group of students, the grades and gender are summarized below А B с Total 8 9 10 Male Female Total 4 12 3 12 13 23 27 20 47 If one student is chosen at random, Find the probability that the student was male AND got a "B". Preview Get help: Video Box 1: Enter your answer as a number (like 5,-3, 2.2172) or as a calculation (like 5/3, 213,5+- Enter DNE for Does Not...
Use a ratio identity to find cot 0 if sin0 = - and cos 0 = coto Preview TIP Enter your answer as a number (like 5.-3.2.2172) or as a calculation (like 5 243, 5+4) Enter DNE for Does Not Exist, oo for Infinity Points possible: 3 This is attempt 1 of 2. Submit
Is x - 4 a factor of * -8.73 4.x² + 8x - 6722 Select an answer The remainder when you divide is Box 1: Select the best answer Box 2: Enter your answer as an integer or decimal number. Examples: 3, 4, 5.5172 Enter DNE for Does Not Exist, oo for Infinity Find all zeros of f(x) = 923 - 12.2 - 83 - 8. Enter the terms separated by commas. Enter exact value, not decimal approximations. Preview Box...
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