At a particular restaurant, each pizza roll has 60 calories and each mini hotdog has 70 calories. A combination meal with pizza rolls and mini hotdogs has a total of 21 pizza rolls and mini hotdogs altogether and contains 1380 calories. Determine the number of pizza rolls in the combination meal and the number of mini hotdogs in the combination meal.

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

Reduce fractions expressing probability to lowest terms. in 3,000 repetitions of an experiment, a random event occurred in 500 cases. the expected probability of this event is?

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?