please help me with this please i beg you please help be a good person?

Question

ok please help me i need help with this math qiestions only 3.please show step by step.one 1.-3to the second power +(-(-3to the thrid power))- 8. seocnd one 2.1/2 * -3 / 5/4 + 3/5 - 1/10. and thrid one 0.25 * (-8).please help me give me steps how to do it.i know the answers there -26, -7/10 and -2 but i want to know how you got those answers.

Answer 1

(3) 0.25 is the same as 1/4
1/4 * -8 = -8/4 = -2