2 3/4− 1 2/3
Give your answer as a mixed number where appropriate.

Step-by-step explanation:

2 3/4 = 2 9/12

1 2/3 = 1 8/12

you do this so that denominators are the same

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you then add them

-

1 + 2 = 3

8/12 + 9/12 = 17/12

17/12 = 1 5/12

1 5/12 + 3 = 4 5/12

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

investment b is an ordinary annuity with $3,909.64 in the account after one year.

step-by-step explanation: