A certain population has 1,000 people in it. Which of the following numbers would be an appropriate number for a random sample?

1,000
900
200
10

3x + 4y = 5 x- 3y = -7 solve by substitution

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.

Awindow has the shape of a rectangle with a semi circle at the top. find the approximate area of the window using the dimensions shown. 4ft by 8ft