Why is the numbers with a 5 in the ones place not prime numbers

The perimeters of the rectangles shown are equal. What is the perimeter of each rectangle? #1. rectangle has one side n+0.6 and the other side has n #2. rectangle has n+0.1 on one side but the other side has 2n

Jim is running on a trail that is 5/4 of a mile long. How many miles has he run so far?

Jen wrote 10 times as many pages of a school report as tom. they wrote 396 pages altogether. how many pages did each student write?

How much will you save if a watch is marked 1/5 off the regular price 46.60

Scissors come in packages of 3. Glue sticks come in packages of 10. Martha wants to by the same number of each. What is the fewest glue sticks martha can buy?

What is the value of 3 x squared minus 5 x y + 5 y squared for x = negative 6 and y = 2?

When a number x is multiplied by 9, the result is 35. What is the value of x?

9e + 4 = - 5e + 14 + 13e solve for e

How many terms are in the algebraic expression 3x - 9xy + 10=

Which equation can be solved by using this system of equations? {y=3x^5-5x^3+2x^2-10x+4 {y=4x^4+6x^3-11 The answer choices are: A.) 3x^5-5x^3+2x^2-10x+4=0 B.) 3x^5-5x^3+2x^2-10x+4=4x^4+6x^3-11 C.) 3x^5+4x^4+x^3+2x^2-10x-7=0 D.) 4x^4+6x^3-11=0