Which expression is equivalent to sin 7pi/6?
a. sin pi/6
b. sin 5pi/6
c. sin 5pi/3
d. sin 11pi/6

Option: D

Step-by-step explanation:

To find the equivalent option,

= sin 210

= -0.5

Now, check for all the options, select the option which is equal to -0.5.

Check for option: D  

= sin 330

= -0.5

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.