What is the solution to the following system of equations?

x+y=5
x-y=1
step by step

Which of the following best describes the graph below? a. it is a function, but it is not one-to-one. b. it is a one-to-one function. c. it is not a function. d. it is a many-to-one function.

Three coins are flipped. what is the probability that there will be at least two tails?

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²