1. which method would be the simplest way to solve the system?
7x + 5y = 19
–7x – 2y = –16

a. graphing
b. substitution
c. elimination
d. distributive

2. what is the solution of the system?
7x + 5y = 19
–7x – 2y = –16

a.(2, 1)
b.(1, 2)
c.(7, 5)
d.(–7, –2)

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.

Consider the function represented by the equation 1/2 j + 1/4 k equals 3 which shows the equation written in function notation with j as the independent variable

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.