Which graph is inverted

y = 1+x^2
y = 1 - x^2
y = x^2 -1
-y = 1 - x^2

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

Write an expression that represent sarah’s total pay last week.represent her hourly wage with w monday 5 tuesday 3 wednesday 0 noah hours wednesday 8 only with w wage did noah and sarah earn the same amount last week?

If i had 1234 apples and 1 banana what is the total amount