Hi! Simplify:

a) √49y² if y ≤ 0

b) -√(9+y)² if y < -10

c) -5√4x^6 if x < 0

d) 5√y^8 if y < 0

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square

Solve this 364x-64x=300x and 12(x2–x–1)+13(x2–x–1)=25(x2–x–1)

You went to a restaurant and spent $53.25 on the meal. there was a 6% sales tax. what was the amount of money, not including a tip, you spent at the restaurant?