Answer:
a₁ = - 24
Step-by-step explanation:
The n th term of an AP is
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Given a₇ = 2a₅ , then
a₁ + 6d = 2(a₁ + 4d) = 2a₁ + 8d ( subtract 2a₁ + 8d from both sides )
- a₁ - 2d = 0 → (1)
The sum to n terms of an AP is
=
[ 2a₁ + (n - 1)d ]
Given
= 84 , then
(2a₁ + 6d) = 84
3.5(2a₁ + 6d) = 84 ( divide both sides by 3.5 )
2a₁ + 6d = 24 → (2)
Thus we have 2 equations
- a₁ - 2d = 0 → (1)
2a₁ + 6d = 24 → (2)
Multiplying (1) by 3 and adding to (2) will eliminate d
- 3a₁ - 6d = 0 → (3)
Add (2) and (3) term by term to eliminate d
- a₁ = 24 ( multiply both sides by - 1 )
a₁ = - 24
Answer:
C
Step-by-step explanation:
Since the company earns $0.05 for every mile, we would multiply m by 0.05. We also add it with 30 since it is a base charge. This makes it C
It can't be A or B since that would mean the company earns $30.05 for every mile.
It can't be D since that would mean the company earns $30 for every mile with a base charge of $0.05.
Answer:
Hi there
Your answer is
He gives Max 12 cards
Step-by-step explanation:
2/6 of 36
2/6 * 36/1
72/6=12
12 cards is 2/6th of 36 cards
Answer:
Step-by-step explanation:
A
Answer:
84
Step-by-step explanation:
28x3=84
I hope i did that right
please give me Brainliest you dont have to tho