1. -5
five steps up, +5
2. +2
two rooms to the left, -2
3. +190m
190 m below sea level, -190m
4. -9°C or 23°F
nine degrees above freezing, 9°C or 41°F
5. +$18
a loss of $18, -$18
6. -4
four wins, +4
7. -15 km
15 km east, +15 km
8. +41°
latitude of 41° south, -41°
9. i’m guessing they’re deductions, being receipts relate of spending, but i’m not sure. my guess is -$85
payments of $85, +$85
10. -$25
a bank deposit of $25, +$25
11. -1 ft
one foot above ground, +1 ft
12. +3
3 points off, -3
13. -$50
a gain of $50, +$50
14. -10 lbs
10 lbs gained, +10 lbs
4.5 all you need to do is length x width x height
We have been given that
3x - y = 3 and
y = 2x + 2
Substitute y = 2x + 2 in the first equation, we get,
3x - (2x + 2) = 3
3x - 2x - 2 = 3
x - 2 = 3
x = 5
y = 2x + 2
= 2(5) + 2
= 12
Hence, the solution is (5, 12).
Answer:
now that is ever easy enough u have to add
Answer:
It would take 54 minutes to the element X to decay to 15 grams.
Step-by-step explanation:
A radioactive half-life refers to the amount of time it takes for half of the original isotope to decay and its given by
where,
= quantity of the substance remaining
= initial quantity of the substance
= time elapsed
= half life of the substance
We know that the element X decays radioactively with a half life of 13 minutes (), there are 260 grams of it () and we want to find how long () would it take the element to decay to 15 grams ().
Using the above formula and solving for , we get that
