Depends on how rich you are
if you are very rich, use meters (or yards)
if you are kinda rich, use feet
if you are average, use centimeters (or inches)
if poor, use milimeters
If the discriminant b^2-4ac is 0, then you have TWO EQUAL, REAL ROOTS.
If you're given the x-intercepts, you can determine the factors of the polynomial as follows: Take -3, change the sign and write (x+3). Take 5, change the sign and write (x-5). Then the eq'n of the parabola is
f(x) = (x+3)(x-5) = x^2 - 2x -15, in which a=1, b = -2 and c= -15.
You can find the x-coordinate of the vertex, which is also the equation of the axis of symmetry, using
x= -b / (2a). Here, x = -(-2) / (2[1]), or x = 1
Find the y-coordinate by subbing 1 for x in the equation above:
y = (1)^2 - 2(1) - 15 = 1 - 2 - 15 = -16
The vertex is at (1, -16) and the equation of the axis of symm. is x = 1.
Answer:
logₐ(8) = 0.903
Step-by-step explanation:
logₐ(8) = logₐ(2)³
= 3logₐ(2) [Since, ]
= 3(0.301) [Given → log(2) = 0.301]
= 0.903
Therefore, logₐ(8) = 0.903 is the answer.
Answer:
L = 20 cm, W = 10cm
Step-by-step explanation:
P=2L+2W
P=60,L=2W
60 = 2(2W)+2W
60=4W+2W
60=6W
W=10
plug in L=2W
L=2x10
L=20