Answer:
Step-by-step explanation:
Given the explicit function as
f(n) = 15n+4
The first term of the sequence is at when n= 1
f(1) = 15(1)+4
f(1) = 19
a = 19
Common difference d = f(2)-f(1)
f(2) = 15(2)+4
f(2) = 34
d = 34-19
d = 15
Sum of nth term of an AP = n/2{2a+(n-1)d}
S20 = 20/2{2(19)+(20-1)15)
S20 = 10(38+19(15))
S20 = 10(38+285)
S20 = 10(323)
S20 = 3230.
Sum of the 20th term is 3230
For the explicit function
f(n) = 4n+15
f(1) = 4(1)+15
f(1) = 19
a = 19
Common difference d = f(2)-f(1)
f(2) = 4(2)+15
f(2) = 23
d = 23-19
d = 4
Sum of nth term of an AP = n/2{2a+(n-1)d}
S20 = 20/2{2(19)+(20-1)4)
S20 = 10(38+19(4))
S20 = 10(38+76)
S20 = 10(114)
S20 = 1140
Sum of the 20th terms is 1140
The decimal value of 16/32 is 0.5
:)
Answer: x=1 or x=-3
Step-by-step explanation:
Quadratic formula is 
a=1 b=2 c=-3
Substitute
22.4/4 = 5.6 cm
5.6^2 = 31.36 cm^2 per side
Since the later surface area only counts for 4/6 sides on the cube, (31.36)(4) = 125.44 cm^2
Answer:
Hope this helps any beginners of Latin or Roman Numerals!
NUMBERS 100-1,000.
Number Latin numerals Cardinal Number
1,000 M mille
