In triangle JKL, tan(b°) = three fourths and sin(b°) = three fifths. If triangle JKL is dilated by a scale factor of 3, what is cos(b°)? triangle KL in which angle K is a right angle and angle L measures b degrees
cos(b°) = three fifths
cos(b°) = four fifths
cos(b°) = five thirds
cos(b°) = five fourths

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

If g^-1(x) is the inverse of g (x) which statement must be true

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.