Lena purchased a prepaid phone card for $20. long distance calls cost 21 cents a minute using this card, lena used her card only once to make a long distance
call. if the remaining credit on her card is $12.23, how many minutes did her call last?

Which of the statements about the graph of the function y = 2x are true? check all of the boxes that apply. the domain is all real numbers x because the exponent of 2 can be any real number when the x-values increases by 1 unit, the y-value multiplies by 2. the y-intercept is (0, 1). the graph never goes below the x-axis because powers of 2 are never negative. the range is all real numbers.

Which of the following three dimensional figures has a circle as it’s base

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2