What polyominal should be subtracted from 3x^2+4x-1 to get the difference equal to x^2

What is the range? can’t seem to find it out

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

What is the x-intercept and y-intercept of the equation 2x+1. 2o