If a = {1, 2, 3} and b = {1, 2, 3, 4, 5, 6, 7, 8} then a ∪ b ø {1, 2, 3, 4, 5, 6, 7, 8} {1, 2, 3}

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Find the perimeter of the figure shown above. a. 40 cm c. 52 cm b. 60 cm d. 75 cm select the best answer from the choices provided

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.