Acard was selected at random from a standard deck of cards. the suit of the card was recorded, and then the card was put back in the deck. the table shows the results after 40 trials.
what is the relative frequency of selecting a club?
outcome club diamond heart spade
number of trials 8 12 11 9
a.
17%
b.
20%
c.
25%
d.
30%

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.