Mathematics, 23.06.2019 23:30 stellaglenn205
Derrick adds equations a and b to solve this system of equations. what makes this approach a valid method in general for solving a system of equations? equation a: 5x+4y=24, equation b: 3x-4y=16 choices: a. as long as addition is used on both sides or subtraction is used on both sides, a true equation will remain true. b. adding a quantity like 5x+4y to one side of an equation and another quantity like 24 to the other side maintains the equality if the two quantities are equal. c. because the y-terms cancel: (5x+4y)+(3x−4y)=5x+3x+4y−4y=8x  ; d. the method will give the correct solution, x=5x=5, and y=-14y=-14. 5(5)+4(-1/4)=24 3(5)−4(-1/4)=16
Answers: 3
Mathematics, 21.06.2019 15:20
The speed of a falling object increases at a constant rate as time increases since the object was dropped. which graph could represent the relationship betweent time in seconds, and s, speed in meters per second? speed of a falling object object over time
Answers: 1
Mathematics, 21.06.2019 18:00
What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers
Answers: 1
Mathematics, 21.06.2019 18:40
2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?
Answers: 1
Mathematics, 21.06.2019 19:30
Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?
Answers: 1
Derrick adds equations a and b to solve this system of equations. what makes this approach a valid m...
Mathematics, 13.01.2020 02:31
English, 13.01.2020 02:31
Chemistry, 13.01.2020 02:31
Mathematics, 13.01.2020 02:31
History, 13.01.2020 02:31
Mathematics, 13.01.2020 02:31
History, 13.01.2020 02:31
Social Studies, 13.01.2020 02:31
English, 13.01.2020 02:31