Which answers show a correct plan to solve this problem?
fred bought a bagel for $2 and a cup of coffee for $3. how much change did fred get back from $10?
choose all answers that are correct.
a.
step 1: subtract $2 from $10.
step 2: subtract $3 from the difference.
b.
step 1: add $2 and $3.
step 2: subtract the sum from $10.
c.
step 1: add $2 and $3.
step 2: add the sum to $10.
d.
step 1: subtract $2 from $3.
step 2: subtract the difference from $10.

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

Consider a bag that contains 220 coins of which 6 are rare indian pennies. for the given pair of events a and b, complete parts (a) and (b) below. a: when one of the 220 coins is randomly selected, it is one of the 6 indian pennies. b: when another one of the 220 coins is randomly selected (with replacement), it is also one of the 6 indian pennies. a. determine whether events a and b are independent or dependent. b. find p(a and b), the probability that events a and b both occur.

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )