Which transformation can not be used to prove that ABC is congruent to DEF

An astronaut is in equilibrium when he is positioned 140 km from planet X and 581 km from planey Y, along the straight line joining the planets' centers. What is the ration of the masses X/Y? I know the answer is 0.

Find the product (x+y) (4x-5y)

Solve r=l+3w/2 solve for w

What is a simpler form of the following expressions? (7p - 8) (7p + 8) A. 49p^2 + 112p + 64 B. 49p^2 - 112p - 64 C. 49p^2 + 64 D. 49p^2 - 64

A pet store has b tanks of fish. each tank has 30 fish. what is the total number of fish in the store.

Which rate is equivalent to the unit rate of 14 miles per gallon? two gallons over thirty two miles thirty two miles over two gallons three gallons over forty-two miles forty-two miles over three gallons

It takes Ramirez family 3 days to travel 1,560 miles, how many days will it take them to travel 6,640 miles?

What two numbers multiply to 12and add to - 7

To simplify 8.3 - 4 15 (6.1 + 12), which operation must be performed first

painted a fence that was 84 meters long. She was able to paint 4 meters per hour. How many meters of fence were left after Alyssa had been painting for 6 hours?