What is the sum of k and the opposite of k?

The opposite of a number  or a variable is the number or variable written with a negative sign.For example opposite of 4 is -4.Opposite of x is -x.

The question is first asking us to write opposite of variable k.

The opposite of k is -k.The question is then asking us to find the sum of  k and the opposite of k .That is k+(-k)= k-k =0

When two opposites are added the result is 0.

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%