Help plzx i need to hand this in for my test

-17a +7b + 16ab

Step-by-step explanation:

look for all the number that have only a in them and then combine them

-9a - 8a

next look for all the ones that have only b in them and combine them as well

12b - 5b

Then look for any ab combinations to combine with other ab's since there is only one it will just be

16ab

so in the end, you have

-17a +7b + 16ab

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!