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MATH SOLVE
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at a schoolnumber of boys : number of girls = 11 : 9there are 124 MORE boys than girlswork out the total number of students at the school
General
2 months ago
Ally has a bag of candy. After dividing the candy equally among six people and eating 4 pieces of candy she had 7 pieces left. How many pieces of candy did ally start with?
General
2 months ago
A taxicab service charges a flat fee of $7 plus an additional $1.25 per mile driven. Show the relationship between the total cost and the number of miles driven. Which variable is independent, and which is dependent? Write an equation to model the relationship, and make a table to show the cost of 4 to 10 miles.
General
2 months ago
what number is 5 times as much as 6
General
2 months ago
An important factor in solid missile fuel is the particle size distribution. Significant problems occur if the particle sizes are too large. From production data in the past, it has been determined that the particle size (in micrometers) distribution is characterized by 3x−4, x > 1, f(x) = 0, elsewhere. (a) Verify that this is a valid density function. (b) Evaluate F(x). (c) What is the probability that a random particle from the manufactured fuel exceeds 4 micrometers?
General
2 months ago
what number is 7 times as much as 9
General
2 months ago
The student government association is selling roses for Valentines Day to raise money for their trip to the state convention.The cost of each rose is $1.50 and the florist charges a delivery fee of $25.The class plans to sell the roses for $5.00 each a. Define the variableb.Write a cost function c. Write a revenue functiond. Write a profit function
General
2 months ago
Emilia is shopping for fresh produce at a farmers’ market. She bought a watermelon for $5, and she also wants to buy peppers. Each pepper is $0.75. Let t represent the total cost of the produce and n be the number of peppers bought. Determine which variable is independent and which is dependent, and write an equation that models the situation. Then, make a table to show the cost for 1 to 5 peppers.
General
2 months ago
Which expressions are equivalent to 5p+3p+(-9)5p+3p+(−9)5, p, plus, 3, p, plus, (, minus, 9, )? Choose all answers that apply: (Choice A) A 8p+98p+98, p, plus, 9 (Choice B) B 3(p+(-3))+5p3(p+(−3))+5p3, (, p, plus, (, minus, 3, ), ), plus, 5, p (Choice C) C None of the above
General
2 months ago
what is 1 fifth divided by 6
General
2 months ago
find the total number of one, two, and three digit prime numbers that can be formed using the digits 2,3,5 and 7. No digit is to be used more than once in a number
General
2 months ago
help please, i get close to what the answer is supposed to be but a not getting it correct.
General
2 months ago
Danielle earns a 8.25% commission on everything she sells at the electronics store where she works. She also earns a base salary of $625 per week. How much did she earn last week if she sold $4,300 in electronics merchandise? Round your intermediate calculations and answer to the nearest cent.
General
2 months ago
Sofia can type the work in 10 hours. Nova can do it in 15 hours. They work together for 4 hours, then Sofia and Nova finish the job. How long did it take to do the entire job?
General
2 months ago
A man earns $112 interest in one year on an investment of $1400. What was his rate of interest?
General
2 months ago
One month, a homeowner used 150 units of gas and 520 units of electric for a total cost of $84.20. The next month, 210 units of gas and 405 units of electric were used for a total cost of $82.35. Find the cost per unit of gas and electric using substitution.
General
2 months ago
IQ scores based on the Stanford-Binet IQ test are normally distributed with a mean of 100 and standard deviation 15. If you were to obtain 100 different simple random samples of size 20 from the population of all adult humans and determine 95% confidence intervals for each of them, how many of the intervals would you expect to include 100? One would expect 95 of the 100 intervals to include the mean 100.
General
2 months ago
A Markov chain has the transition matrix shown below: P =[0.20.8] 0.60.4 (1) If, on the first observation the system is in state 1, what is the probability that it is in state 1 on the next observation? (2) If, on the first observation the system is in state 1, what state is the system most likely to occupy on the next observation? (If there is more than one such state, which is the first one.) (3) If, on the first observation, the system is in state 1, what is the probability that the system is in state 1 on the third observation? (4) If, on the first observation the system is in state 1, what state is the system most likely to occupy on the third observation? (If there is more than one such state, which is the first one.)
General
2 months ago
A junk box in your room contains eighteen old batteries, seven of which are totally dead. You start picking batteries one at a time and testing them. Find the probability of each outcome. a) The first two you choose are both good. b) At least one of the first three works. c) The first four you pick all work. d) You have to pick five batteries to find one that works.
General
2 months ago
20.Relief Donations The number of private donationsreceived by nongovernment disaster relief organizations canbe modeled asf(x) = 0.3xe -0.03x thousand donationswhere x is the number of hours since a major disaster hasstrucka. Write an expression for the rate of change in donations.b. At what time is the rate of change of donations zero?c. What is the donation level at the time found in part b?
General
2 months ago
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