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Raj and Aditi like to play chess against each other. Aditi has won 12 of the 20 games so far. They decide to play more games. How many more games will Aditi have to win to have a 70% winning record? 12 + x = 0.70(20 + x) x = ≈ 6.67 She will have to win 7 more games to have a 70% winning record. How many more games will Aditi have to win to have an 80% winning record? The linear equation that models this is . Aditi would have to win more games to have an 80% winning record.
General
2 months ago
What is the solution of 3x+y=9 and 3x minus 5y=15
General
2 months ago
What is the value of the discriminant, b2 − 4ac, for the quadratic equation 0 = x2 − 4x + 5, and what does it mean about the number of real solutions the equation has?
General
2 months ago
The vertex of the parabola below is at the point (4, -1). Which of the equations below could be the one for this parabola?
General
2 months ago
Betty picks 4 random marbles from the bowl containing 3 white, 4 yellow, and 5 blue marbles The probability that exactly 1 of the 4 marbles drawn is blue is [blank]. The probability that atleast 1 of the 4 marbles drawn is white is [blank]
General
2 months ago
Alexis invests $475 in a bank account that earns 1.25% interest compounded annually. Which function models the growth of her investment over x years?
General
2 months ago
A group of men and women were given a maze puzzle. The time it took each person to solve the puzzle is recorded in the table.The sample size of men isA.19B. 34C. 53and the sample size of women isA. 19B. 34C. 53The mean time taken byA. WomenB. Mento solve the puzzle is less than that taken byA. WomenB. Men
General
2 months ago
in the area of each triangular regions is as shown, what is the area of the polygon?161718
General
2 months ago
The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 248.5 and a standard deviation of 61.1. (all units are 1000 cells/mul.) using the empirical rule, find each approximate percentage below.a. what is the approximate percentage of women with platelet counts within 2 standard deviations of the mean, or between 126.3 and 370.7?b. what is the approximate percentage of women with platelet counts between 65.2 and 431.8?
General
2 months ago
Bailey and Elena compete in a swim race. Their times are shown below. Round each time to the nearest whole second. Then estimate how many seconds Bailey won the race byBailey: 35.78 seconds Elena: 39.51 seconds
General
2 months ago
Which of the following vectors are orthogonal to (1,5)? Check all that applyA. (-2,5)B. (10,-2)C. (-1,-5)D. (-5,1)
General
2 months ago
what is the area of a circumference 37.7
General
2 months ago
PLEASE HELP ASAP! Use complete sentences to describe a relationship between two sets that you can describe mathematically. For example, if you make a habit of eating 10 carrot sticks a day you could mathematically describe the relationship between the number of days in the month and the number of carrot sticks you eat in that month.
General
2 months ago
Stephen is playing with a toy parachute. He drops the toy parachute from the rooftop of a building. The expression below represents the vertical height from the ground, in feet, of the toy parachute x seconds after being dropped from the rooftop.-16x^2 + 16x + 80Which statement best describes the term 80?the initial height from where the toy parachute is droppedthe time it takes the toy parachute to landthe speed of the toy parachutethe maximum height of the toy parachute
General
2 months ago
A jewelry supplier has a supply of pairs of earrings of which 40% are platinum pairs. a jewelry store orders five sets of earrings from this supplier. if the supplier selects the pairs of earrings at random, what is the chance that the jewelry store gets exactly two sets of platinum pairs?
General
2 months ago
The area of an equilateral triangle is LaTeX: 108\sqrt[]{3}\:ft^2 108 3 f t 2 . What is the length of one side of the triangle?
General
2 months ago
Roman stands across from a flag pole. What is the distance from Roman's feet to the base of the flag pole? Round only your final answer to the nearest tenth. (no units- only put the answer)
General
2 months ago
A survey was done that asked people to indicate whether they preferred to ride a street bike or a mountain bike.The results of the survey are shown in the two-way table. Amjed is making a relative frequency table from this data. What operation should Amjed perform to determine the relative frequency of a person over 30 years old who prefers to ride a mountain bike?
General
2 months ago
1. What values of a, b, and c would you use in the quadratic formula for the following equation?5x^2 + 9x = 4a. a= -4, b = 9, c = 5b. a = 5, b = 9, c = -4c. a = 5, b = -4, c = 9d. a = 5, b = 9, c = 4 (I think it might be this one)2. Which expression gives the solutions of -5 + 2x^2 = -6x ?( see attachment)3. Which method is the best method for solving the equation 8x^2 - 13x + 3 = 0?a. square rootsb. factoringc. graphingd. quadratic formulaEven if you can only answer one of these please still answer, thank you!
General
2 months ago
will give brainliest + lots of points !The students at Kayla's school are forming teams of three students for a quiz bowl competition. Kayla is assuming that each member of a team is equally likely to be male or female. She uses a coin toss (heads = female, tails = male) to simulate this probability. Here is Kayla's data from 50 trials of 3 coin tosses:thh tth tth tht thh htt hth hht hth tth tth hht hth tht tht tth tth thh thh htt tht thh tth hht hth thh tht tth hht thh hhh tth tth hth htt tht thh hhh htt thh htt ttt tht ttt thh hht hth htt hht hthAccording to this data, what is the experimental probability that a team will consist entirely of two boys and a girl?a.0.375b.0.23c.0.46d.0.33
General
2 months ago
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