Why are the non examples incorrect methods of random sampling

A pizza parlor offers mushrooms, tomatoes , and sausages as toppings for the plain cheese base. how many different types of pizzas can be made

What is 1000+2000+3/4

Change 7/5 to a whole number

What is th factor of 84

Explain why rational number is either a terminating or repeating decimal?

The Freedom Trail is 2 1/2 miles long. Ana walked 5/8 mile from Boston Common to the Paul Revere House. Then, she walked 3/8 mile from the Paul Revere House to Copp's Hill Burying Ground.

Alexandra has 36 coins valued at $6.00. She has only nickels and quarters. Which equation can be used to solve for the number of nickels, n?

Find the 9th term of geometric sequence 7,14,28, ...

Solve the equation log6 (13 - x) = 1.

Create the explicit formula for the sequence: 2, 8, 14,. (Hint: Write your formula and then simplify it.)