Answer:
C infinitely many solutions
Step-by-step explanation:
multiply second equation by -3
-3 × (4x + 3y) = -12 ➡ -12x - 9y = 36 now add this to second equation
12x + 9y -12x -9y = -36 + 36 ➡0 = 0
we say there's infinite solutions because whatever value you write for x and/or y there will be a solution.
Answer:

Step-by-step explanation:
Since the country wants to reduce the emission by the percentage each year, the function will be decaying function. The formula of decaying function will look like this

Where
E(t) = the number of emission after t years
E0= the number of initial emission= 40 million tons
r=rate of growth/decay = 35%= 0.35
t= time in years
If we put the number, the equation will be:

Answer:
8 births to 1sf
Step-by-step explanation:
4.2m births per year in unspecified country.
4.2 / 0.000365 = 11506.8493 per day
11506.8493 / 24 = 479.452054 per hour
479.452054 / 60 = 7.99086757 per minute = 8 births to 1sf
Answer:
she will use 4.
Step-by-step explanation:
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