Leticia simplified an expression. Her work is shown below. 4.5 divided by one-fourth + 2 and one-half minus 0.75 times 8

Step 1 18 + 2 and one-half minus 0.75 times 8

Step 2 18 + 1.75 times 8

Step 3 18 + 14

Step 4 32

Where did Leticia make her first mistake?

Which statements about these triangles is true

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex