so, first, simplify.

4^2 = 4 raised to the second power=4 times 4 = 16

2*7 = two times seven = 14

5(4) = five times four = 20

so, put it back in the equation…

4^2 +2*7 -(5(4)-15)

will become:

16 + 14 – (20 – 15)

simplify the one enclosed in the parenthesis…

16 + 14 – 5

30 – 5

25

so, 25 is the answer in your first question.

PUT IN CORRECT ORDER:

ascending order(least to greatest): -10, -6, -1, 0, 1, 4, 9

descending order(greatest to least): 9, 4, 1, 0, -1, -6, -10

SIMPLIFY: -(-(-23))

multiply first the inner one.

-(-23) negative times negative is positive

-(23)negative times positive is negative

so… the result will be -23.

-10, -6, -1, 0,1,4,9

The third is three negatives so it is still negative.

-1 is negative

– (-1) is positive

-(-(-1) is negative again