$x-y=12,\\18x-12y=18 ( divide by 6)\\3x-2y=3, 2nd Eq.\\multiply- first -equation by 2\\\\2x-2y=24, 1st Eq.\\subtract-the- second -equation- from -first\\2x-3x=24-3,\\-x=21 or x=-21,\\\\substitute-the-value-of -x\\-21-y=12,\\y=-21-12= -33\\$

Step-by-step explanation:

3 0

3 years ago

Three friends were eating chocolate chip cookies after school. Nacy ate four less than two times the amount of cookies that Kate

galben [10]

Let the number of cookies that kate eats be ‘n’
kate : n
nacy : 2n-4
avery : 2(2n-4)

n + 2n-4 + 2(2n+4) = 18
7n - 12 = 16
7n = 28
n = 4

kate : 4
nacy : 2x4 - 4 = 4
avery : 2(2x4 - 4) =8

7 0

3 years ago

If you roll a standard 6 sided die, whats the probability that you get a 1,2,3,5, or 6?

Papessa [141]

Answer:

5/6

Step-by-step explanation:

1 has a 1/6 chance
2 has a 1/6 chance
3 has a 1/6 chance
5 has a 1/6 chance
6 has a 1/6 chance
1, 2, 3, 5, or 6 has a 1/6+1/6+1/6+1/6+1/6=5/6 chance

6 0

3 years ago

Read 2 more answers

21 5/8% as a decimal

Hitman42 [59]

21.625 is the answer

4 0

2 years ago

A circular plate has circumference 17 inches. What is the area of this​ plate?

A circular plate has circumference 17 inches. What is the area of this plate?