# Questions on Algebra: Average answered by real tutors!

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 Algebra: Average Solvers Lessons Answers archive Quiz In Depth

## Tutors Answer Your Questions about Average (FREE)

 Question 211123: A couple plan to have exactly four children. (a) Construct a tree diagram and list the sample space. (b) Find the probability that the family has at least three boys. show the work so i can check myself....thanks Click here to see answer by jim_thompson5910(28696)

 Question 211182: Last fall, a gardener planted 74 tulip bulbs. She found that only 62 of the bulbs bloomed in the spring. a) Find the empirical probability that a tulip bulb of this type will bloom b) How many of the bulbs should she plant next fall if she would like at least 95 to bloom? I need to show the problem here.Thanks Click here to see answer by stanbon(57940)

 Question 211430: A train travels at an average speed of 20 mph through urban areas, 50 mph through suburban areas, and 75 mph through rural areas. If a trip consists of traveling half an hour through urban areas, 3-1/2 hours through suburban areas, and 3 hours through rural areas, what is the train’s average speed for the entire trip? Click here to see answer by ankor@dixie-net.com(15745)

 Question 211452: what is the average rate of change of the function from x=3 to x=5 using this function: f(x)=2-xsquared Click here to see answer by RAY100(1637)

 Question 211537: The objective of statistics is best described as: A) To make inferences about a sample based on information we get from a population B) To make inferences about a population based on information we get from a sample taken from the population C) To use population mean,  as an estimate of the sample mean, D) To make inferences about a sample with a high degree of reliability Click here to see answer by Theo(3504)

 Question 211696: How many different ways are there for an admissions officer to select a group of 6 college candidates from a group of 15 applicants for an interview? Click here to see answer by rfer(12726)

 Question 211691: The results of a survey for an airline are shown below Traveler Male Female Total Business 47 72 119 Vacation 71 64 135 Total 118 136 254 Use the chart to find the probability that the traveler was a) male b) on vacation given the traveler was female c) male given the traveler was on vacation Click here to see answer by stanbon(57940)
 Question 211691: The results of a survey for an airline are shown below Traveler Male Female Total Business 47 72 119 Vacation 71 64 135 Total 118 136 254 Use the chart to find the probability that the traveler was a) male b) on vacation given the traveler was female c) male given the traveler was on vacation Click here to see answer by nerdybill(7003)

 Question 211688: A jar contains 4 yellow marbles, 12 green marbles, and 11 black marbles. If one marble is selected at random, what is the probability that it is not yellow? Click here to see answer by stanbon(57940)

 Question 212010: Two balls are to be selected without replacement from a bag containing one red, one blue, one green, and one yellow ball. How many points are there in the sample space? Click here to see answer by Edwin McCravy(8999)

 Question 212108: what is the average of 35.74 Click here to see answer by drj(1380)

 Question 212121: Hi, I know this may be a very simple question for you but I need assistance. Here is the question: A northern city had the following temperatures one winter week. Find the average temperature for the week: -7, -15, +2, +9, -1, +17, +23. Please help me with the answer and explain how the answer was computed. Thanks!! Click here to see answer by Fombitz(13828)

 Question 212200: A license plate is to consist of three letters followed by two digits. How many different license plates are possible if the first letter must be a vowel (a, e, i, o, u), and repetition of letters is not permitted, but repetition of digits is permitted? Click here to see answer by stanbon(57940)

 Question 212005: A specific brand of bike comes in two frames, for males or females. Each frame comes in a choice of three colors, red, white, and blue, and with a choice of three seats, soft, medium, and hard. a) Use the counting principle to determine the number of different arrangements of bicycles that are possible. b) Construct a tree diagram illustrating all the different arrangements of bicycles that are possible. c) List the sample space. Click here to see answer by RAY100(1637)

 Question 214067: I really need some help, my daughter has been trying to solve this problem for 2 days. One number is 4 less than 5 times another. If the sum is 26, what are the two numbers? Click here to see answer by tutor_paul(490)

 Question 214211: If you can drive your car 540 miles on 26 2/3 gallons of gasoline, how many miles can you drive on one gallon Click here to see answer by rfer(12726)

 Question 214846: You have 2 cups of sunflowers and 3 cups of Raisins total calories are 2900 Find the # of calories per cup of Raisins if it is 400 calories less than number od calories per cup of sunflowers Click here to see answer by elima4(15)

 Question 215199: Sandy's average for three tests is 84. What must she earn on the next test to raise her average to 88? Click here to see answer by drj(1380)

 Question 215557: After taking 4 quizzes, your average is 76 out of 100. What must your average score be on the next five quizzes to increase your average to 81? Click here to see answer by drj(1380)

 Question 215682: if the average of six numbers is 18 and the average of three of the numbers is 15 then what is the sum of the remaining three numbers Click here to see answer by drj(1380)

 Question 215969: The arithmetic mean (or average) of A, B and C is 10. The value of A is six less than the value of B, and the value of C is three more than the value of B. What is the value of C? Click here to see answer by rfer(12726)

 Question 216097: I am in Algebra 1 and they are giving us geometry questions about cones. It says, "Find the volume of a cone if r is 10 centimeters and h is 30 centimeters. Click here to see answer by stanbon(57940)

 Question 216464: if you drive 528 miles and you average 16.5 miles per gallon, how much do you spend for gas if it costs \$1.35 a gallon? Click here to see answer by rfer(12726)

 Question 217243: (3a+12)/3 simplify Click here to see answer by rfer(12726)

 Question 217252: (x-2)/(x-4)=2/(x-4) Click here to see answer by chibisan(131)

 Question 217246: [16a^7/3b^5]/[8a^3/6b] divide and simplify Click here to see answer by chibisan(131)

 Question 217257: check mark [(a+3)^2] Click here to see answer by jim_thompson5910(28696)

 Question 217244: multiply and simplify Click here to see answer by ichudov(499)

 Question 219401: What is the slope of the line which contains (-4,-3) and (-8,2)? Click here to see answer by susanaramya(12)

 Question 219962: how do you find the number or value of n in the following problem? n+6n=77 Click here to see answer by rfer(12726)

 Question 220112: how can i turn 300/45 to equal 6 2/3 without a calculator and without getting this number 6.66667 or turning that number to 6 2/3?? Click here to see answer by jsmallt9(3296)

 Question 220284: Triangle: A-B= 65 A-C= 33 B-C= 56 Identify sin A in simplest terms. Identify cos A in simplest terms. Identify tan A in simplest terms. Please help me on this I could not draw the triangle. I could just give the numbers. Thank You Click here to see answer by stanbon(57940)

 Question 220634: From 11 positive integer scores on a 10-point quiz, the mean is 8, the median is 8, and the mode is 7. Find the maximum number of perfect scores possible on this test. Click here to see answer by Theo(3504)

 Question 220757: The U.S. Weather Bureau defines a cloud ceiling as the altitude of the lowest clouds that cover more than half the sky. To determine a cloud ceiling, a powerful searchlight projects a circle of light vertically on the bottom of the cloud. An observer sights the circle of light in the crosshairs of a tube called a clinometer. A pendant hanging vertically from the tube and resting on a protractor gives the angle of elevation. Find the cloud ceiling if the searchlight is located 1000 feet from the observer and the angle of elevation is 30.0° as measured with a clinometer at eye-height 6 feet. (Assume three significant digits.) Please help solve and explain this. Click here to see answer by ankor@dixie-net.com(15745)

 Question 220302: On a sunny day, a building and its shadow form the sides of a right triangle. If the hypotenuse is 32 m long and the shadow is 24 m, how tall is the building? Please help me on this. Click here to see answer by likaaka(51)

 Question 220286: Solve 3x1/2 + 12 = 9 Please help and explain to me. Thanks Click here to see answer by Alan3354(31487)

 Question 223333: Half the students in a class are 14 years, one third are 15 and the remainder are 13. Is the mean age greater than or less than the median age? I am having an argument with my grandson about this one. He is saying the mean is 14...I am saying that you cannot figure this out without knowing the total number of students in the class. Who is right?? Click here to see answer by stanbon(57940)

 Question 223783: x^2 + 8x = 9. Click here to see answer by drj(1380)

 Question 224459: Let f(x) = (x – 2)2. Find x such that f(x) = 25 Click here to see answer by chibisan(131)

 Question 224460: 7x^2 = 21 please help Click here to see answer by chibisan(131)

 Question 224463: x^4 + 7x^2 – 8 = 0 Please help me with this. Thanks Click here to see answer by drj(1380)

 Question 224458: 7x^2 = 21 Please help me solve. Click here to see answer by drj(1380)

 Question 224605: Let f(x) = (x – 2)^2. Find x such that f(x) = 25 I do not understand the question :( Click here to see answer by drj(1380)

 Question 226260: A test is worth three times as much as a quiz. If a student has test grades of 85 and 92, and quiz grades of 82, 75, and 95, what is the student's average grade? Looking for the set-up formula and solution. Thank you. Click here to see answer by rfer(12726)

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