Topic: Arithmetic and geometric progressions. 1. The term of the series -2,1,4,7,10 is:
a) 145
b) 295
c) 895
d) 595
2. If in a PA, the first term is -2, the term 200 is 396, then its difference (d) is:
A) 5
B) 2
C) 4
D) 3
3. In a PA the eighth term is 161, d = 2, so the first term is:

A) 3
B) -1
C) 2
D) 4
4. If in a PA, the last term is 289, the first is 13 and the difference d = 4, then the number of “n” terms is:
A) 70
B) 71
C) 69
D) 68
5. In the series: 1,4,7,10,… .the sum of the first 300 terms is:
A) 134850
B) 133950
C) 89850
D) 850
Help me please!!

d.192

step-by-step explanation:

12*16=192

answer is 67%

step-by-step explanation:

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: