Mathematics, 01.12.2021 20:00, Bukdom
Becky and Tommy are asked to solve −4x − 25 = 8x + 15. Identify where one of them made an error.
BECKY:
−4x − 25 = 8x + 15
−4x − 25 − 8x = 8x + 15 − 8x
−12x − 25 = 15
−12x − 25 + 25 = 15 + 25
−12x = 40
Negative 12x over 40 equals 40 over 40
x equals negative three-tenths
TOMMY:
−4x − 25 = 8x + 15
−4x − 25 + 4x = 8x + 15 + 4x
−25 = 12x + 15
−25 − 15 = 12x + 15 − 15
−40 = 12x
negative 40 over 12 equals 12x over 12
x equals negative ten-thirds
(1 point)
Becky made the error when she subtracted 8x
Becky made the error when she divided by 40
Tommy made the error when he added 4x
Tommy made the error when he added 15
Answers: 3
Mathematics, 21.06.2019 17:30, rosie20052019
One positive number is 9 more than twice another. if their product is 95, find the numbers
Answers: 1
Mathematics, 21.06.2019 19:00, JvGaming2001
The probability that you roll a two on a six-sided die is 1 6 16 . if you roll the die 60 times, how many twos can you expect to roll
Answers: 1
Becky and Tommy are asked to solve −4x − 25 = 8x + 15. Identify where one of them made an error.
B...
Biology, 04.04.2021 15:50
Biology, 04.04.2021 15:50
Biology, 04.04.2021 15:50
Mathematics, 04.04.2021 15:50
Social Studies, 04.04.2021 15:50
Social Studies, 04.04.2021 15:50
Geography, 04.04.2021 15:50