The difference between two numbers, a and b, is 21. the difference of 5 times a and two times b is 18. what are the values of a and b?

  (a, b) = (-8, -29)

Step-by-step explanation:

The two relations can be written as the equations ...

  a - b = 21

  5a -2b = 18

Subtracting 2 times the first equation from the second, we have ...

  (5a -2b) -2(a -b) = (18) -2(21)

  3a = -24 . . . . . simplify

  a = -8 . . . . . . . divide by 3

Substituting into the first equation, we have ...

  -8 -b = 21

  -b = 29 . . . . . .  add 8

  b = -29 . . . . . . multiply by -1

The values of a and b are -8 and -29, respectively.

b

step-by-step explanation:

it have 5 sides and 5 identicle angle.the rest does not have the same property as b.

brainliest

the functions have the same rate of change i think. i narrowed it down to this answer and "the rate of change of tour 1 is greater" but i got it wrong using that answer so im assuming its the answer above. (this is a question i also answered from the iready site if anyone needs a reference)