Explain why a change from 20 to 40 is a 100 percent increase, but a change from 40 to 20 is a 50 percent decrease

What types of problems can be solved using the greatest common factor?

Find the area of the parallelogram by imagining that the blue triangle is moved onto the purple triangle.

Which of the equations below represents a line perpendicular to the y-axis? O A. y = 6x B. y = - 6 C. x = 6 D. y=x

Andrea planted tomatoes and cucumbers on 1/5 of an acre of land. If each type of plant took up an equal area of Andrea's land, how many acres did each type of plant cover?

Mrs. Barkley is teaching a class in which the students are decorating gift boxes. She wants the students to decorate gift boxes using a ratio of 4 gems for every 3 ribbon flowers. Dan used 20 gems for every 15 ribbon flowers.

Which expression is equivalent to 4x-10y

1/3 (22) - 1 - 1/2 (12)

In a fish tank, the ratio of goldfish to guppies is 2 to 4. There are a total of 12 fish in the fish tank. Determine the number of goldfish in the fish tank.

I'm doing easy math but i don't remember learning this so heres the question. One angle of a triangle is 20 degrees. The second angle's measurement is four times the third. Whats is the measure of the third angle?

If I have 10 dollars and I win 6 out of 10 and lose 4 out of 10 and bet 1$ each trade, how much should there be left after 10 trades?