I NEED HELP FOR NUMBER 8 LETTERS A, B,C. I HAVE TO SHOW WORK AS WELL IM LOST RIGHT NOW

Step-by-step explanation:

alright, i'll help you but only if you learn from this okay?

let's start from A

4(-5)+7(2)

let's remember what is the order of operations

exponent

bracket

multiplication / division

addition / subtraction

here we have multiplication and addition:

but where is the multiplication  symbol? well, sometimes multiplication symbol can be brackets

4(-5)+7(2)

so of cource multiplication first

4 times -5 = -20

7 times 2 =14

then we add

-20 + 14 = -6

B.

2(5-9)-(-3-8)

remember that inside the brackets first before multiplication

so : (5-9) = -4

(-3-8) = -11

2(-4)-(-11)

let's multiply 2 times -4 equals -8

-8 -(-11)

negative and negative equals positiove

-8 + 11 = 3

C.

(-7) ^ 2 +10(-5)

remember!, exponent first

-7^2 = -7 * -7

= 49

49 +10(-5)

then multiply 10 by -5

49 + -50

= -1

AND DONE! , hope you learn something new..

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation:

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step-by-step explanation: