Minus 1 both sides
x²-8x=-1
take 1/2 of the linear coefient and square it
-8 is the linear coefient
-8/2=-4, (-4)²=16
add 16 to both sides
x²-8x+16=16-1
factor perfect squaer trinomial
(x-4)²=15
square root both sides, remember to take positive and negative roots
x-4=+/-√15
not exactly sure what to put in the blnaks
but
the solutions are x=4+√15 and x=4-√15
Answer:
B
Step-by-step explanation:
The y-int. is -5 like the equation and the slope is positive
Answer:
t = 1
Step-by-step explanation:
16 - 2t = t + 9 + 4t
Group like terms
16 - 2t = t + 4t +9
Add similar elements t + 4t = 5t
16 - 2t = 5t + 9
Subtract 16 from both sides
16 - 2t - 16 = 5t + 9 - 16
Simplify
-2t = 5t - 7
Subtract 5t from each side
-2t - 5t = 5t - 7 - 5t
Simplify
-7t = -7
Divide both sides by -7
-7t/ -7 = - 7/ - 7
Simplify
t = 1
The answer would be be B)2. The ratio of circles to squares is 2 to 1
