Last week an almanac cost 3.50 this week it is on sale for 2.80 what is the percent decrease?

7x+8y=-18, 4x-9y=-3 solve the system of equations

Correct answer brainliest asap an d 99 pointsss what are relative frequencies to the nearest hundredth of the columns of two way table column a 102, 18 colunm b 34, 14 answers choices 0.15 0.25 0.29 0.44 0.56 0.71 0.75 0.85

Which of the following is the true for f(x) = 5cos