To find it, evaluate it at the endpoints and the vertex
in form
f(x)=ax²+bx+c
the x value of the vertex is -b/2a
given
c(t)=1t²-10t+76
x value of vertex is -(-10)/1=10
evaluate c(0) and c(13) and c(10)
c(0)=76
c(13)=115
c(10)=76
it reached minimum in 2000 and 2010
porbably teacher wants 2010
the min value is $76
Answer:
f(3) = 4
f(-7) = -26
Step-by-step explanation:
Hi there!
To find f(3), replace every x with 3:
Therefore, f(3)=4.
To find f(-7), replace every x with -7:
Therefore, f(-7)=-26.
I hope this helps!
Answer:
A) 
Step-by-step explanation:
An equation is a function of 
when is the independent variable, that is:
(1)
Where 
is the dependent variable.
According to this, does not represent a function of , since the independent variable is a function of , that is, 
. Therefore, the correct answer is A.
Answer:
r = i + j + (-2/3)(3i - j)
Step-by-step explanation:
Vector Equation of a line - r = a + kb ; where r is the resultant vector of adding vector a and vector b and k is a constant
if a = i + j ; b = t(3i - j) and r = -i +s(j)
for this to be true all the vector components must be equal
summing i 's
i + 3ti = -i; then t = -2/3
j - tj = sj; then s = 1-t; substitue t; s=1+2/3 = 5/3
so r = i + j + (-2/3)(3i - j) which will symplify to -i + 5/3j
