Evaluate the expression for the given value of the variable. 51 + 3/7r. r= - 1/2

The answer is -50.429

You would replace the -1/2 where r is at, divide 7& -1/2, then add it to 51

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%