Comporueba si las siguientes fracciones son equivalentes.
a. 3/5 y 12/20 b. 4/5 y 8/10 c. 7/20 y 40/100 d. 6/14 y 21/49

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?

Two lines intersect and two of the vertical angles measure 115°. what is the measure of the other two vertical angles? 65° 85° 90° 245°

What is the probability that a person's favorite season is fall? write the probability as a fraction. spring - 13% summer - 39% fall - 25% winter - 13% none, i like them all - 10%