Answer:
C.
Step-by-step explanation:
1/-7 × -6/5 = 6/35
A. -1/7 × 6/5 = -6/35
B. -6 × -7/5 = 42/5
Answer: C.
2x+3y=60 solve for x...
x=(60-3y)/2
p=xy^3, using x from above:
p=y^3(60-3y)/2
p=(60y^3-3y^4)/2
dp/dy=(180y^2-12y^3)/2
dp/dy=90y^2-6y^2
dp/dy=0 when:
90y^2-6y^3=0
6y^2(15-y)=0, we know y>0 so
y=15, since x=(60-3y)/2
x=7.5
(We solved it this way because otherwise you get quartic equations and cubic derivatives, yuck :P)
Answer:
the second one dose I believe
Answer:
n-1
Step-by-step explanation:
Consecutive means that they have a difference of one, so the expression will be n-1.
Answer:
20π ft²
Step-by-step explanation:
Calculate the circumference of this circular area: C = 2πr, where r is the radius:
C = 2π(10 ft) = 20π ft²
