Given that ∠XQR = 180° and ∠LQM = 180°, which equation could be used to solve problems involving the relationships between ∠XQM and ∠RQM?
A) 180 + (140 − 7a) = (70 − 3a)
B) 180 + (70 − 3a) = (140 − 7a)
C) 180 − (140 − 7a) = (70 − 3a)
D) (140 − 7a) − (70 − 3a) = 180

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!

36

step-by-step explanation:

i think it would be c

mark brainliest if im right

step-by-step explanation: