Current worlds population is 7.6 billion (7,600,000,000), so Japan’s population is equal to 1.67 % of the world’s population.
The "mean" is the "average" you're used to, where you add up all the numbers and then divide by the number of numbers.
Answer:
Step-by-step explanation:
Half an hour everyday means she exercises 30 minutes per day.
5 hours is 300 minutes. 300/30= 10 days of exercise.
(x+3)(x+3) = x^2 -3 + 3x
x^2 + 3x + 3x + 9 = x^2 + 3x - 3
x^2 + 6x + 9 = x^2 + 3x - 3
6x + 9 = 3x - 3
3x + 9 = -3
3x = -12
x = -4
Check:
(-4+3)^2 = (-4)^2 - 3(1+4)
(-1)^2 = 16 - 3(5)
1 = 16-15
1 = 1 :)
