Answer:
-21
Step-by-step explanation:
1-2+4-8+16-32
=-21
Answer:
Cost of staying hotel with fixed charge of 50 and $6 for each day stay
where d is number of days of stay
M is total money charged by hotel.
Step-by-step explanation:
We have to describe a situation to fit into the given model.
model is M = 50 + 6d
it consist of two part
constant part 50
and variable part 6d which depends on value of d,
Let take M as money
d as days
in hotel, hotel service charge is fixed at 50
and for each day stay 6$ is charged.
Thus,
total money charged by hotel will be equal to sum of
fixed part 50
$6d for staying d days in the hotel
which can be modeled by given equation
M = 50 + 6d
![\bf ~~~~~~\textit{parabola vertex form} \\\\ y=a(x- h)^2+ k~\hspace{7em}vertex~~(\stackrel{}{ h},\stackrel{}{ k}) \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \stackrel{f(x)}{y}=(x+1)^2-8\implies y=1[x-(\stackrel{h}{-1})]^2+(\stackrel{k}{-8})~\hfill \stackrel{vertex}{(-1,-8)}](https://tex.z-dn.net/?f=%5Cbf%20~~~~~~%5Ctextit%7Bparabola%20vertex%20form%7D%0A%5C%5C%5C%5C%0Ay%3Da%28x-%20h%29%5E2%2B%20k~%5Chspace%7B7em%7Dvertex~~%28%5Cstackrel%7B%7D%7B%20h%7D%2C%5Cstackrel%7B%7D%7B%20k%7D%29%0A%5C%5C%5C%5C%5B-0.35em%5D%0A%5Crule%7B34em%7D%7B0.25pt%7D%5C%5C%5C%5C%0A%5Cstackrel%7Bf%28x%29%7D%7By%7D%3D%28x%2B1%29%5E2-8%5Cimplies%20y%3D1%5Bx-%28%5Cstackrel%7Bh%7D%7B-1%7D%29%5D%5E2%2B%28%5Cstackrel%7Bk%7D%7B-8%7D%29~%5Chfill%20%5Cstackrel%7Bvertex%7D%7B%28-1%2C-8%29%7D)
the equation is in x-terms, meaning is a vertical parabola, and therefore the axis of symmetry will be the x-coordinate of the vertex, namely x = -1.
40 times 12
480
there are 480 lockers
