Answer: −9z−273
Step-by-step explanation:
Let's simplify step-by-step.
−12(7z+4)+15(5z−15)
Distribute:
=(−12)(7z)+(−12)(4)+(15)(5z)+(15)(−15)
=−84z+−48+75z+−225
Combine Like Terms:
=(−84z+75z)+(−48+−225)
=−9z+−273
