Answer:
Step-by-step explanation:
[tex]22=a(0-10)^2+72\qquad\text{subtract 72 from both sides}\\\\22-72=a(-10)^2+72-72\\\\-50=a(100)\qquad\text{divide both sides by 100}\\\\\dfrac{-50}{100}=\dfrac{100a}{100}\\\\-0.5=a\to a=-0.5[/tex]
Good evening ,
Answer:
a=-1/2
Step-by-step explanation:
22=a(-10)²+72
22=100a+72
22-72=100a
-50=100a
-1/2=a.
:)
