Answer:
1. (a) a+b=86
2. (c) 5.99a+9.99b≤600
Step-by-step explanation:
1.
a = amount of 16gb memory sticks
b = amount of 21gb memory sticks
Gary is buying a memory sticks for each of the 86 teachers. Therefore the total sum of both 16gb and 32gb memory sticks should equal 86:
a+b=86
2.
a = amount of 16gb memory sticks
b = amount of 21gb memory sticks
Each 16gb memory stick cost $5.99, and each 32gb one costs $9.99. Therefore...
5.99a = total cost of 16gb memory sticks
9.99b = total cost of 32gb memory sticks
Gary has to spent an amount less than or equal to $600. Therefore, the total sum of the costs of both 16gb and 32gb memory sticks should be less than or equal to 600:
5.99a+9.99b≤600
Find common ratio
1 times -3=-3
-3 times -3=9
an=a1(r^(n-1))
a1=first term
r=common ratio
n=which term
an=1(-3)^(n-1)
9th term
n=9
an=1(-3)^(9-1)
an=1(-3)^(8)
an=1(6561)
an=6561
answer is D
Answer:
D)
Step-by-step explanation:
We solve each of the inequalities
Option A
Option B
Option C
Option D
Therefore, only option D has -12 in its solution set.
30 x 30 + 25 x 15 = $1275
So,
30 tickets were sold from the $30 type, while 15 tickets were sold from the $25 type!