Correct answers only !
do the ratios 10/20 and 1/2 form a proportion?
yes or no?

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1