What might cause the disappearance of animals in the wild

A student has some $1 and $5 bills in his wallet. He has a total of 18 bills that are worth $50. How many of each type of bill does he have?

Angie and her sister have $15 to spend on pizza. A medium pizza costs $11.50 plus $0.75 per topping. What is the maximum number of toppings Angie and her sister can get on their pizza?

What is a mixed number greater than one

Find the equation of the axis of symmetry for the parabola y = x2 + 4x + 9

A cube has a side length of 10 meters. What is the volume of the cube? 10 m3 10,000 m3 1000 m3 100 m3

Ten people stand in a line. The first goes to the back and the next sits down, so the person who was third in line is now first in line. Now that person sits and the other sits. The proses is repeated until only one person remains.

Raphael graphed the function g (x) = x+2 and f (x) = x-1. How many units below the y intercept of g (x) is the y intercept of f (x)

The ratio of white chocolate to dark chocolate sold at a candy shop was 4 : 3. If there were 28 bars of white chocolate sold, how many bars of dark chocolate were sold?

11 + 1 + 0.01 + 0.11 + 0.111 = ? CA

the half life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. starting with 165 grams of radioactive isotope how much will be left after 4 half lives.