CosA=(21^2+23^2-25^2)/2*21*23
cosA=345/966
A=cos^-1(345/966)
A=69.08
the answer is D. y≤ -2x + 2
take x=2
then (-2 x 2) + 2
⇒ -4 + 2 = -2
c.y+3=f(x) and 0+3 therefore x=3
Answer:
https://www.symbolab.com/solver/step-by-step/7%5Cleft(x%2By%5Cright)%5E%7B2%7D%2B13x%5Cleft(x%2By%5Cright)-2%5E%7B2%7D
Step-by-step explanation:
try this link