Answer - 8b + 5a
The answer to the question ^^^
Answer:
-3 3/4
-5
-704
Step-by-step explanation:
Answer:
S_k = k(3k - 1)/2
S_(k + 1) = [(k +1) (3k +2)]/2
Step-by-step explanation:
Sₙ = 1 + 4 + 7 + … + (3n - 2) = n(3n - 1)/2
To find Sk, replace all occurrences of n in Sₙ with k.
S_k = 1 + 4 + 7 + … + (3k - 2) = k(3k - 1)/2
To find S_(k+1), replace all occurrences of n in Sₙ with (k +1)
S_(k + 1) = 1 + 4 + 7 + … + [3(k + 1) -2] = (k +1) [3(k + 1) - 1]/2
After distributing the 3s and simplifying, we get
S_k = 1 + 4 + 7 + … + (3k + 1) = (k + 1) (3k + 2)/2
Answer:
x squared+4x−12
Step-by-step explanation:
Answer: Casey bought 4 1/2 pounds of apples
The equation is 0.88x - $1.50 = 2.46
x is the unknown number of pounds of apples.
0.88 is the cost per pound, 0.88x is the total cost of the apples before the discount .The discount is $1.50 $2.46 is the cost after the discount.
Part b Step-by-step explanation:
0.88x - $1.50 = 2.46 . Add $1.50 to both sides
0.88x - $1.50 + $1.50 = 2.46 + 1.50
On left, 1.50-1.50=0 so "cancels' on the right, add $2.46 + 1.50 = 3.96
0.88x = 3.96 is the cost before discount . Divide both sides by .88
.88x/.88 = 3.96/.88 . .88/.88 = 1 so 1 'cancels' leaving x. 3.96/.88 = 4.5
x = 4.5
part c
4.5 is 4 1/2, the (previously unknown) number of pounds of apples.
Casey bought 4 1/2 pounds of apples.