In a bag of keys, there are 14 silver keys, 7 black keys, 10 copper keys, and 4 painted keys of various colors. One key is drawn out at random. What is the probability that the key that is drawn is silver or copper?

D. 24/35

Step-by-step explanation:

Step one:

Given

Sample space

14 silver keys,

7 black keys,

10 copper keys, and

4 painted keys of various colors

Sample size= 14+7+10+4= 35

in probability "or" means that we need to add events.

Hence, the probability that the key that is drawn is silver

= 14/35

the probability that the key that is drawn is copper

=10/35

Step two:

The probability that the key that is drawn is silver or copper

14/35+10/35

=14+10/35

24/35

17   x 256=4352

sorry if this is wrong, i'm new.

step-by-step explanation:

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.