-2x-y=-22
2x – 6у =-20
System of elimination

(8,6)

Step-by-step explanation:

Solve by elimination!

-2x-y=-22

2x-6y=-20

cross out, and merge!

-7y=-42

y = 6

Plugin y in one equation (I choose the easy one XD)

-2x-6=-22

-2x=-16

x = 8

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!

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.