3 years ago

-9xy + 9x -17xy + 9y PLS HELP

Mathematics

2 answers:

Kitty [74]3 years ago

4 0

Answer:

-8xy

Step-by-step explanation:

Aleonysh [2.5K]3 years ago

3 0

Answer:

−26xy+9x+9y

Step-by-step explanation:

Let's simplify step-by-step.

(−9x)(y)+9x−17xy+9y

=−9xy+9x+−17xy+9y

Combine Like Terms:

=−9xy+9x+−17xy+9y

=(−9xy+−17xy)+(9x)+(9y)

=−26xy+9x+9y

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Cassandra and Yvette each have a calculator. Yvette starts at a 100 and subtracts 7 each time. Isandro starts at zero and adds 3

34kurt

This can be be solved the following way:
Yvette starts at 100 and subtracts 7 k times, as for Cassandra (or Isandro, the question is not clear on this) she starts at 0 and presses adds 3 k times. This leads to the following equation:
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So for k=10 they will both display the same number.
We can now either choose the viewpoint of Cassandra or Yvette:
If we chose Yvette then we'll have $100-7*10=30$ and for Cassandra we have, $3*10=30$ .