Marcos had 15 coins in nickels and quarters. he had 3 more quarters than nickels. he wrote a system of equations to represent this situation, letting x represent the number of nickels and y represent the number of quarters. what is the solution?

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is . reset next

What is the cube root of -1,000p^12q3? -10p^4 -10p^4q 10p^4 10p^4q