Answer:V(t) = C·(0.5)t
Step-by-step explanation:
V(t) = computer's value at year t = 600
C = initial cost = 2100
t = years
Answer:
945.35 ml
Step-by-step explanation:
Answer:In this problem,
a
n
=x
a
1
=1
d=6−1=5
∴x=1+(n−1)×5
∴x−1=(n−1)×5
∴(n−1)=
5
x−1
∴n=
5
x−1
+1
∴n=
5
x−1+5
∴n=
5
x+4
Equation (1)
2) Sum of n terms of A.P. is
∑a
n
=
2
n
[2a+(n−1)d]
As given in problem, ∑a
n
=148
∴
2
n
[2a+(n−1)d]=148
∴
2
(
5
x+4
)
[(2×1)+(
5
x+4
−1)5]=148
∴
10
x+4
[2+(
5
x+4−5
)5]=148
∴
10
x+4
[2+x−1]=148
∴
10
x+4
[x+1]=148
∴(x+4)(x+1)=1480
∴x
2
+5x+4=1480
∴x
2
+5x−1476=0
∴x=
2×1
−5±
(5)
2
−4×1×(−1476)
∴x=
2
−5±
25+5904
∴x=
2
−5±
5929
∴x=
2
−5±77
neglecting negative root, we get,
x=
2
−5+77
∴x=
2
72
∴x=36
Step-by-step explanation: i hope it was helpfu;;
Answer:
7(x+11)=9x-18
7x + 77 = 9x - 18
7x - 7x + 77 = 9x - 7x - 18
77 = 2x - 18
18 + 77 = 2x - 18 + 18
95 = 2x
95/2 = 2x/2
x = 47.5
Step-by-step explanation:
1. distribute the bracket
2. subtract 7 from both sides
3. add 18 to both sides
4. divide both sides by 2
Hi!
The set up for the question is like this:
Hope this helps!