Answer:
(-7, -10)

Step-by-step explanation:

Substitute x for -7.

Multiply 4 by -7.

Add 28 on both sides.

Divide -4 on both sides.

Half of a dozen is 6. And 12+12 is 24 and 24+6 is 30. So Katoni bought 30 pencils.
The way you wrote the problem makes the answer 330,600. I think your decimals were meant to be commas. If I am wrong, please forgive me.
Answer:
Option C. His answer is not correct, because the same can not be less than either attend
Step-by-step explanation:
we have

we know that



substitute
----> is not true
therefore
His answer is not correct, because the same can not be less than either attend
Answer:
y= $25-$10.50
Step-by-step explanation: