How do I solve for measurements on triangles

Use the gauss-Jordan method to solve the system of equations x+y-5z=-68 2x-y+3z=19 x-2y+2z=-15

Wich is bigger half of 40 or one fourth of 20?

Translate the verbal phrase into an inequality. All real numbers that are greater than or equal to - 1.5 and less than 9.2

Problem construct a triangle with interior angle measures of 60° and 60° let one of the side lengths beaten what are the length of the other side

Which of these pairs of variables would you expect to be represented by a scatterplot with a negative correlation? A. a person's height and the person's grade on the math test B. the depth of the water in a pond and the amount of rainfall C.

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.