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Use the quadratic formula to solve the equation if necessary round to the nearest hundredth x^2+x-30=8
General
4 months ago
Which of the following describes the following graph? PLEASE ANSWER QUICKA. relation only B. both a function and a relation C. function only D. neither a function nor a relation
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4 months ago
In 2005, Capital City determined its population could be expressed by the function P(x) = -15x + 53,708 where x is the number of years. Which of the following statements is true?A. The city's population was 53,703 in 2005.B. The city's population was 53,813 in 2011.C. The city's population is increasing at a rate of 15 people each year.D. The city's population is decreasing at a rate of 15 people each year.
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4 months ago
Nathaniel can weld a railing in 75 minutes. Brenda can weld a railing 25 minutes faster. If they work together, how many minutes does it take them to weld the railing?
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4 months ago
Manuel wants to buy a window shade to cover the window and frame shown. The window is in the shape of a regular octagon. The radius of the window, including the frame, is 2 ft, and the measure of each edge of the octagonal frame is 1.52 ft. What is the approximate area of the window that needs to be covered, including the frame? These are the answers 2 ft2 7 ft2 11.2 ft2 22.5 ft2
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4 months ago
Before every flight, the pilot must verify that the total weight of the load is less than the maximum allowable load for the aircraft. The aircraft can carry 35 passengers, and a flight has fuel and baggage that allows for a total passenger load of 5 comma 880 lb. The pilot sees that the plane is full and all passengers are men. The aircraft will be overloaded if the mean weight of the passengers is greater than StartFraction 5 comma 880 l b Over 35 EndFraction equals 168 lb. What is the probability that the aircraft is overloaded? Should the pilot take any action to correct for an overloaded aircraft? Assume that weights of men are normally distributed with a mean of 174.9 lb and a standard deviation of 35.2.
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4 months ago
The Office of Admissions and Records of a large western university released the accompanying information concerning the contemplated majors of its freshman class. (Round your answers to three decimal places.) Major % of Freshmen Choosing This Major % of Major That Is Female % of Major That Is Male Business 23 39 61 Humanities 10 58 42 Education 8 63 37 Social science 5 60 40 Natural sciences 10 56 44 Other 44 48 52 (a) What is the probability that a student selected at random from the freshman class is a female? (b) What is the probability that a business student selected at random from the freshman class is a male? (c) What is the probability that a female student selected at random from the freshman class is majoring in business?
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4 months ago
The weight of baby seals is believed to be Normally distributed, with a mean of 69.5 pounds. The average weight of a random sample of 25 baby seals is found to be 69.75 pounds, with a standard deviation of 4.2 pounds. What is the standard error of the mean?0.84 0.30 0.25 0.17 We are unable to determine the standard error of the mean because we do not know σ.
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4 months ago
What is an equation of the line that is perpendicular to y+1=-3(x-5) and passes through the point 4,-6
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4 months ago
Perform the operation and write the answer in simplest form. 2 1/5 ÷ 31/5
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4 months ago
The author drilled a hole in a die and filled it with a lead weight, then proceeded to roll it 199 times. Here are the observed frequencies for the outcomes of 1,2,3,4,5, and 6 respectively: 28, 29, 47, 40, 22, 33. Use a 0.05 significance level to test the claim that the outcomes are not equally likely. Does it appear that the loaded die behaves differently than a fair die?
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4 months ago
SUPER EASY WILL GIVE BRAINLEIST IF DONE BEFORE 10 PM PLS HURRY. IF U HAVE TIME PLS HELP ME ON OTHER QUESTIONS THANK YOU <3
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4 months ago
Assume that random guesses are made for seven multiple choice questions on an SAT test, so that there are equals 7 trials, each with probability of success (correct) given by pequals0.5. Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4.
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4 months ago
3. In a test of weight loss programs, 40 adults used the Atkins weight loss program. After 12 months, their mean weight loss was found to be 2.1 lb, with a standard deviation of 4.8 lb. Construct a 90% confidence interval estimate of the standard deviation of the weight loss for all such subjects. Does the confidence interval give us information about the effectiveness of the diet?
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4 months ago
A senior student researches to estimate the time taken by applicants to fill out an application form for college admissions. Fifty randomly selected students were timed as they filled out the form. The time required had mean of 20.4 minutes with a standard deviation of 2.1 minutes. Construct a 99.8% confidence interval for the mean time taken for all students to fill out the form.
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4 months ago
What is the measure of x? Help me on this Geometry question.
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4 months ago
A right triangle has the length of one of the legs equal to 8cm, and the sine of the angle, opposite to that leg equal 0.8. What are the lengths of the other leg and hypotenuse of that triangle?
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4 months ago
The local Tupperware dealers earned the following commissions last month. What was the mean commission earned? Round your answer to the nearest cent. $2894.21 $1777.15 $2144.77 $4096.37 $4046.29 $1786.37 $3296.69 $4086.27 $2784.22 $4027.79 A. $3437.79 B. $3094.01 C. $3088.01 D. $3867.52
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4 months ago
) For what values of k does the function y = cos(kt) satisfy the differential equation 4y 00 = −25y? (1) (b) For those values of k that you found in part (a), verify that every function of the form y = A sin(kt) + B cos(kt) is also a solution to the differential equation (1). (Here, A and B are constants.)
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4 months ago
A message source M of a digital communication system outputs a word of length 8 characters, with the characters drawn from the ternary alphabet {0,1,2}, and all such words are equally probable. What is the probability that M produces a word that looks like a byte (i.e., no appearance of ‘2’)?
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4 months ago
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