How can I add these if they aren't the same. K (2k-5) - 3 (2k+5)

Hello what's up guys

It takes 16 minutes for 9 people to paint 8 walls. How many minutes does it take 4 people to paint 6 walls?

The temperature at 5 pm is 20 degrees Fahrenheit. The temperature at 10 pm is - 5 degrees Fahrenheit. How many degrees did the temperature fall?

When 12 is added to half the sum of a number and 8 the result is 40. what is the number?

Amy just put new tires on her car. if the wheels have a diameter of 8 inches, a out how far does the wheel travel in 2 revolutions

A polynomial is to be constructed that will touch the x axis at most 8 times. What is the minimum degree of the polynomial?

What is the simplest form of this expression? y^2 (-4y^2-7) - 2y^4

Can someone answer this question what is 1+1?

If sin tita = cos tita find tita between 0° and 30°

without multiplying determine which expression has a product greater than 52,678 A) 5/6 x 52,678 B) 9/9 x 52,678 C) 4/3 x 52,678 D) 3/5 x 52,678 How can I tell just looking at it