Answer: -4187
Step-by-step explanation:
-1,-4,-7
^ ^
+-3 +-3 -4- -1= -3
S53= 53/2 [2(-1)+(53-1)] -3
2(-1)= -2 (53-1) = 52•3 53/2=26.5
26.5 [ -2+ -156]= -4187
Answer: 5 cookies
Step-by-step explanation: 8 + .4c = 2.5 + 1.5c
8 + 0.4c = 2.5 + 1.5c
8 · 10 + 0.4c · 10 = 2.5 · 10 + 1.5c · 10
80 + 4c = 25 + 15c
4c = 15c - 55
4c - 15c = 15c - 55 - 15c
-11c = -55
c = 5
Answer:
Step-by-step explanation:
A triangular number is number that can be recomposed in the form of an equilateral triangle. Each triangular number is defined by:
Hence, evaluating n=100
So we have a total of 39000
and a total of 9+4 parts to split it in
so split 39000 into 13 parts
39000/13 = 3000
9:4
9(3000) : 4(3000)
27000:12000