Why do the product of multi-digit numbers with zeros and one-digit numbers sometimes have zero in them and sometimes have no zero in them

Two angles of a triangle have the same measure and the third one is 39 degrees greater than the measure of each of the other two. find the measure of the largest angle in the triangle.

Bayside Insurance offers two health plans. Under plan A, Giselle would have to pay the first $110 of her medical bills, plus 35% of the rest. Under plan B, Giselle would pay the first $160, but only 20% of the rest.

Adam had 91 dollar. If he spent 21 dollars on new books, what is the ratio of money he still has to money he's spent?

Two lions, Fluffy and Fireball, met at the zoo. Fluffy's tail is 1 1/3 of a meter long. Fireball's tail is 1 1/4 of a meter long. How much longer is Fluffy's tail than Fireball's tail?

A group of friends is going to the movies. Each ticket costs $8.00. Write an equation to model the total cost of the group's tickets.

Using a common denominator to write an equivalent fraction for each fraction what would 1/3, 1/5, common denominator be?

How Many square inches will fill a rectangle 6 inches by 2 inches?

On Saturday, $585 was collected from the sale of 55 tickets for a performance. Adult tickets are $12 and student tickets cost 25% less than adult tickets. Find the number of adult tickets and number of student tickets sold on that day.

The square below has side 6x. Find the area of the square remaining after a circle of radius 4x is removed from the square; in other words, find the area of the shaded region in factored form

What is the greatest common factor of 14 and 28