Hi there i need help in this 1 (-23) + (-15) =
2 12 + 24 =
3 (-28) + (-16) =
4 15 + 29 =
5 29 + (-13) =
6 (-14) + (-10) =
7 + (-20) =
8 (-21) + 19 =
9 11 + (-20) =
10 24 + (-6) =
11 28 + 15 =
12 23 + (-19) =
pls are negative and positive numbers

The sales tax rate is 7.25%. how much tax in dollars is added on an item that costs $56.00? a. $4.06 b. $7.25 c. $14.50 d. $60.06

Evaluate cos2θ for cosθ = square root of 3/2

Zoey made 5 1/2 cups of trail mix for a camping trip. she wants to divide the trail mix into 3/4 cup servings. a. ten people are going on the trip. can zoey make enough 3/4 cup servings so that each person gets one serving? b. what size would the servings need to be for everyone to have a serving?