3x-9y=12; 27x+9y=18 are these lines perpendicular or parellel or neither

Are 6/5 and 6/2 rational numbers?

Given that lines a and b are parallel, angles 1 and 5 are congruent because they are corresponding angles, and angles 1 and 4 are congruent because they are vertical angles.

What is the y and x intercept of y=2x+152

I dont quite get the hang of prime numner and learning what numbers to replace the letter with i guess the basic order of operation?

on the last period, our teacher had 1/2 of an easier left. she gave that to her 2 students equally. How much easier did each student tale home

5. Andre is solving the equation 4 (x + 3) = 7. He says, "I can subtract from each side to get 4x = 1 and then divide by 4 to get x = " Kiran says, "I think you made a mistake." a. How can Kiran know for sure that Andre's solution is incorrect? b.

On three examinations, Dana received scores of 84, 89, and 78. What score does Dana need on the fourth examination to raise his average to 85?

You have a Spanish meeting every forth day and a math club meeting every tenth day. Today you have both meetings. In how many days will you have both meetings on the same day again?

5.2 turned into a fraction in simplest form.

A certain laptop is really popular and sells for $199.99. Since sales are so good, the store raises the price by 13%. What is the cost of the laptop after the markup?