The silver town people went to a fancy restaurant after the big event. grammy gave the server a $15 tip. if the tip was 20% of the cost of dinner, how much was dinner? choose a.$60 b.$45 c.$75 d.$50

Negative 5 1/12 + negative 4 1/4 + 6 3/4

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?

Solve 2 - 3 cos x = 5 + 3 cos x for 0° ≤ x ≤ 180° a. 150° b. 30° c. 60° d. 120°