30x + 30y = 450
20x + 25y = 345
answer: 3 square ft per minute
N in (-oo:+oo)
-13 = n-8 // - n-8
8-n-13 = 0
-n-5 = 0 // + 5
-n = 5 // * -1
n = -5
n = -5
Answer:
30 ounces i think
Step-by-step explanation:
20% times 5 = 100%
6 in every 20%
since there is 5 20%'s, multiply 6 times 5 and you get 30
Answer:
i think so
Step-by-step explanation:
There will be a 25 grams left after 3240 years.
The half-life of Radium-226 is 1620 years. If we divide 3240 by 1620 the answer is 2. So that means the amount of Radium-226 will divide in half twice.
100 / 2 = 50 / 2 = 25
