Help me

x = 120°

Step-by-step explanation:

this is a 7-sided polygon and the sum of the interior angles is (7-2)×180° = 900°

add all 7 angles together and set equal to 900

x + 150 + x - 20 + 140 + 120 + x + 20 + 130 = 900

combine 'like terms'

3x + 540 = 900

3x = 360

x = 120

17 1/3

step-by-step explanation:

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!