Two Aps have the same first and last terms .The first Ap has 21 terms with a common difference of nine how many terms has the ot
her ap if it common difference is 4
1 answer:
Answer:
46 terms
Step-by-step explanation:
a₁=b, a₂₁= bₙ, d₁=9, d₂=4
n=?
---------------
a₂₁= a₁+20d₁= a₁+20*9= a₁+180
bₙ= b₁+(n-1)d₂= a₁+4(n-1)
a₁+4(n-1)=a₁+180
4(n-1)=180
n-1= 180/4
n-1= 45
n=46
You might be interested in
Answer:
43
Step-by-step explanation:
Answer:
is this you¿¿??????¿¿!!!!!!
3/4 also equals 12/16 so 12/16+5/16= 17/16 or 1 1/16
Answer:
x = 7
Step-by-step explanation:
3x - 9 = 12
3x = 12 + 9
3x = 21
x = 21 ÷ 3
x = 7
1.75 gallons of water because one gallon holds 16 cups of water.