Multiplying by 2 and then adding 10 145*2=290+10=300
300*2=600+10=610
610*2=1220 + 10=1230
x=2 y=10
x+y=12
Answer:
Step-by-step explanation:

Answer:
your answer: They are all numbers
Answer:
6 times a larger number (so 6y) is equal (=) to the sum of a smaller number and 18 (x+18)
6y = x+18
Twice of larger number (2y) and the difference of smaller number (x) is equal to 6
2y - x = 6
solve for y. Divide both terms for 6.
6y/6 = 1/6x+3
y = 1/6x+3
second equation solve for y
move x to the right of equal
2y = x + 6
y = 1/2x + 3
This can be done without exponential equations.
It doubles every 12 years so it has doubled in price
5,000 * 2 = 10,000
After 36 years the value has increased 8 times
5,000 * 8 = 40,000
After 48 years the value has increased 16 times
5,000 * 16 = 80,000