Ist all the combinations of four objects a comma b comma c comma and d taken three at a time. Choose the correct answer below. A. a comma b comma c comma d B. abc comma abd comma acb comma acd comma adb comma adc comma bac comma bad comma bca comma bcd comma bda comma bdc comma cab comma cad comma cba comma cbd comma cda comma cdb comma dab comma dac comma dba comma dbc comma dca comma dcb C. aaa comma aab comma aac comma aad comma abb comma abc comma abd comma acc comma acd comma add comma bbb comma bbc comma bbd comma bcc comma bcd comma bdd comma ccc comma ccd comma cdd comma ddd D. abc comma abd comma acd comma bcd

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.

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft