The reciprocal of 2 plus the reciprocal of 7 is the reciprocal of what number

Step-by-step explanation:

14/9.

Reciprocal of 2 = 1/2.

Reciprocal of 7 = 1/7.

1/2 + 1/7 = 7/14 + 2/14 = 9/14, whose reciprocal is 14/9.

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.

70.30

step-by-step explanation: