A quadratic function is a function whose highest power for the variable is 2.
h(x) = 3x(x - 2) - 4 = 3x^2 - 6x - 4 is a quadratic function.
Answer:
n(n+1)(n+5)/3
Step-by-step explanation:
there is no value, as we don't know n.
but we can create a summary formula/ function definition :
this is the sum for k = 1 to n of k×(k+3)
k×(k+3) = k² + 3k
so, the overall sum splits into the sum of k² for k=1 to n, and the sum of 3k for k=1 to n.
and the sum of 3k is 3 times the sum of k for k=1 to n.
Σk² for k=1 to n = [n(n+1)(2n+1)]/6
Σk for k=1 to n = n(n+1)/2
3×Σk for k=1 to n = 3×n(n+1)/2
so, we have a function formula
n(n+1)(2n+1)/6 + 3n(n+1)/2 = n(n+1)(2n+1)/6 + 9n(n+1)/6 =
= n(n+1)(2n+1+9)/6 = n(n+1)(2n+10)/6 = n(n+1)(n+5)/3
Answer:
9 x 10 to the 15th power.
Step-by-step explanation:
I hated I-ready. Good luck!!!
Answer:
Every inch is equal to 9 feet
Step-by-step explanation:
45/5= 9
Answer:
100% = $28
Therefoe 1 % = $28/100
1% = $0.28
20% tip = 20 x $0.28 =$5.60
Step-by-step explanation:
