-b/2a is the axis of symmetry formula.
To solve those 4 questions, find the values of a and b (coefficients of ax^2 and bx term) and substitute them into the formula.
Hope this helps!
(x-h)^2+(y-k)^2=r^2
(x-0)^2+(y+2)^2=9^2
x^2+y^2+4+4y=81
x^2+y^2+4y-81+4=0
x^2+y^2+4y-77=0
Answer:
14
Step-by-step explanation:
D = 2r
D = 2(7)
D= 14
Answer:788
Step-by-step explanation:
When a number with a power is given another power, the powers multiply. Thus,
(2^t)⁸
