Answer: (if you could mark me brainliest that'd be great!)
1. -45
2. -7
3. 13/2
Step-by-step explanation:
1. [tex]-(-5)^{2} +4(-5)[/tex]
evaluate the power to get [tex]-25+4(-5)[/tex]
then multiply the numbers to get -25 - 20
calculate the difference
answer is -45
2. [tex](-3)^{2} -4(-1)(-4)[/tex]
evaluate the power to get [tex]9-4(-1)(-4)[/tex]
calculate the difference of 9-16 (which is the simplified version of [tex]9-4(-1)(-4)[/tex])
answer is -7
3. [tex]-(-1/2)-3(-2)[/tex]
remove the parenthesis
multiply to get 1/2+6
calculate the sum
answer is 13/2
