Answer:mkay, also yes he did
Step-by-step explanation:
1.Remove the parentheses
2.put -5z and 4z together which makes -9z(negative plus positive equals negative)
3.-9z+ -6z=-3z and 7+8=15
4.15 decided by -3=5
so yes, z=-5
Answer:
The answer in the procedure
Step-by-step explanation:
we know that
The lateral area of a cone is equal to
where
r is the radius of the base
l is the slant height
we have
assume 
substitute the values
This value is an underestimate, because the assumed pi value is less than the real value
assumed value
real value 
Answer:
Option A: (-10,0)
Step-by-step explanation:
The given equation of the parabola is in the form of 
where the focus is located at 
. Therefore, the focus of the parabola is 
.
Answer:
1,778
Step-by-step explanation:
Let C and S represent the cost and salvage value of Truck B, respectively. Let X represent the number of miles per year that answers the question.
Truck A's cost for 10 years is ...
A = C+600 +(0.06)(2.25)(10X) -(S+200)
Truck B's cost for 10 years is ...
B = C +(0.07)(2.25)(10X) -S
We want to find X such that Truck A's cost is lower, so ...
C -S +1.35X +400 < C -S +1.575X
400 < 0.225X
1777 7/9 < X
1778 miles driven per year (or more) makes Truck A a better option.
