The house sparrows population has decreased by 41% since 1977. the population is now approximately 6.5 million pairs of birds. what was the estimated sparrow population in 1977?

Someone answer this check out the image!

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. kevin spins the spinner 180 times. kevin determines about how many times the spinner will land on red or green, and his work is shown below. -kevin has the formula reversed; it should be the total number of sections over the number of red or green sections. -kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections. -kevin should multiply by the number of sections in the spinner rather than the total number of spins. -kevin calculated the prediction correctly and did not make any mistakes.