The house sparrows population has decreased by 41% since 1977. The population is now approximately 6.5 million pairs of birds. W
hat was the estimated sparrow population in 1977?
1 answer:
Let x be estimated population in 1977
x - 0.41x = 6,500,000
x = (6,500,000 / 0.59
Answer is approximately 11,017,000
11 million
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Answer:
b
Step-by-step explanation:
1/4*x - 1/6*y= 5 |*18
4/5 *x + 3/8*y = 10 | *8
18/4*x -3*y= 90
32/5*x + 3y = 80
-------------------------
18/4*x+32/5*x / = 170
The answer is a
Answer:
80 to 10
Step-by-step explanation:
2.41+6(0.41)+(lb-7)0.39=7.99
2.41+2.46-2.73+0.39lb=7.99
0.39lb=5.85
lb=15
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