Is the square root of 1-cos20 = - sin true

Answer the following true or false. Justify your answer. (a) If A is a subset of B, and x∈B, then x∈A. (b) The set (x, y) ∈ R2 is empty. (c) If A and B are square matrices, then AB is also square.

Why is it difficult to find length of the hypotenuse the same way the length of the legs can be found?

A circle has a diameter of 8m what is the circumstance of the circle

K=d d=5 find k Determine the value of the indicated variable

The perimeter of the triangle below is 6a + 2b - 5 units. Write an expression to represent the length in units of the missing side of the triangle

Solve 30kx-6kx=8 for x

What is 9-2 (4x+5) if x = - 4

Given a polynomial f (x), if (x - 2) is a factor, what else must be true?

John and Beth plan to visit a bookstore. Based on their previous visits to this bookstore, the probability distributions for the numbe of'boks they will buy is given below. Number of books John wi buy Probability 0.50 0.100.250.

01:49:1 Students are voting on the color of T-shirts to wear on their field trip. There are 160 students-65 boys and 95 girls-going on the field trip. A random sample of students is chosen.