9514 1404 393
Answer:
(c) 2440
Step-by-step explanation:
The sum of the squares of numbers 1 .. n is ...
s(n) = n(n +1)(2n +1)/6
You want the sum of squares from 5 to 19. We can compute that from ...
s(19) -s(4) = (19(20)(39) -4(5)(9))/6 = (14820 -180)/6 = 2440
You can't factor out c or d since we don't know what they are so you have to find an integer. both are divisible by 5, which would become 5(9c+2d). 9 and 2 don't have anything in common so that is it.
45c+10d = 5(9c+2d)
Answer:
36
Step-by-step explanation:
f(x)=x^2
f(-6)=-6^2
negative number raised to even number gives positive result
=36
Answer: 5(3-x)<-2x+6 =
Step-by-step explanation:
Inequality form: X=3
Interval notation: (3,∞)
Step-by-step explanation:
a. (x-2)^2 + (y+1)^2 = 16
b. (x + 2)^2 + (y-2)^2 = 9