Find the sum of all the multiples of 7 in between of 1 and 100

735

the multiple of 7 are 7, 14, 21, ...., 98 ( n = 14 )

this is an arithmetic sequence and the sum to n terms is

= [ 2a + (n - 1 )d ]

d = 14 - 7 = 21 - 14 = 7 and a = 7

= 7 [ ( 2 × 7 ) + (13 × 7 ) ] = 7 ( 14 + 91 ) = 735

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb

well the answer to that is xoxoxo

step-by-step explanation: