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laywah4
28.04.2021 •
Mathematics
Mia babysits some children after school. For each child, she charges x 1 2 dollars per hour. One day she cared for 2 children for 3 hours each. She paid $4 per child for materials for activities. Two students wrote expressions for the amount of money Mia earned. Are their expressions equivalent? Paolo wrote the expression 3(x 1 2) 1 3(x 1 2) 2 8. Carla wrote the expression (3x 1 6) 2 4 1 (3x 1 6) 2 4. Simplify the expressions to see whether they are equivalent. Paolo’s Expression Carla’s Expression 3(x 1 2) 1 3(x 1 2) 2 8 (3x 1 6) 2 4 1 (3x 1 6) 2 4 5 3x 1 6 1 3x 1 6 2 8 5 3x 1 3x 1 6 1 6 2 4 2 4 5 6x 1 4 5 6x 1 4 Why did Paolo add 3(x 1 2) to itself and subtract 8?
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Ответ:
the correct answer is.correct me if i`m wrong
EXERCISE 5-10 In base 10, what digits can the last digit of the square of an integer not be? EXAMPLE 5-4 Find the units digit of 742 + 427. Solution: To find the last digit of 742 + 427, we find the last digit of each of the two quanti ties in the sum. To find the last digit of 742, we break it up into a product of 7's.