We are to calculate the value of the numbers in base 3. One of the ways to do that is to first convert each number to base 10. Do the arithmetic, then convert back to base 3.

121 base 3 +2122 base 3 - 1200 base 3 - 2111 base 3

Let's convert to base10

See attachment for details

From the workings,

121 base 3 + 2122 base 3 - 1200 base 3 - 2111 base 3 = -221 base 3

3 0

2 years ago

True or False? If two lines are crossed by a transversal and corresponding angles are equal, the lines are parallel.

svetoff [14.1K]

TRUE

To visualize this property, you can draw two parallel lines and cross them by a third line.

Corresponding angles are those that are in the same relative position, between the crossing line and the parallel lines. You can see that those (corresponding) angles are equal if and only if the lines are parallel.

4 0

3 years ago

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