Which impact did mountains have on the development of Greek city-states? (1 point)
They isolated the city-states and made them independent.***
They helped increase trade between the city-states.
They had fertile soil so people farmed in the mountains.
People in the mountains worked as sailors and merchants.
The correct answer is: They isolated the city-states and made them independent.
How should you group the following expression to make it easiest to add? 18 − 949 + 79 − 8(1 point)
Responses
(8 − 18) + (49 + 79)
Left Parenthesis 8 minus 18 Right Parenthesis plus Left Parenthesis Start Fraction 4 over 9 End Fraction plus Start Fraction 7 over 9 End Fraction Right Parenthesis
(18 − 8) + (−949 + 79)
Left Parenthesis 18 minus 8 Right Parenthesis plus Left Parenthesis negative 9 Start Fraction 4 over 9 End Fraction plus Start Fraction 7 over 9 End Fraction Right Parenthesis***
(18 − 9 − 8) + (−49 + 79)
Left Parenthesis 18 minus 9 minus 8 Right Parenthesis plus Left Parenthesis negative Start Fraction 4 over 9 End Fraction plus Start Fraction 7 over 9 Right Parenthesis
(18 − 8 − 9)
The correct answer is: (18 - 8) + (-949 + 79)
What should you do if a place value is missing a number?(1 point)
1. Add a zero.***
2. Remove the last digit(s) in the number that has the additional place values.
3. Subtract without it.
4. Nothing.