Solve the system using substitution.
y=8-x
7=2-y

a. (5,13)
b.(13,-5)
c.(3,5)
d.(21,-13)

What is the total surface area of this square pyramid?

What is the solution for the system of equations below? y=3/4x-12 and y=-4x-31. a: (-4,-15). b: (-4,-12). c: (4,-9). d: (4,-47)

Mens' heights are normally distributed with u 68 in and o 6 in. womens' heights have u 65 in with o 4 in. dan is 70 in tall and amy is 68 in tall. who is relatively taller? are they unusually tall?