What is the discriminant of 9x2+2=10x

What does it mean by solve the exponential equation for x?

Determine whether the samples are independent or dependent. upper a data set includes the morning and evening temperature for the lasta data set includes the morning and evening temperature for the last 90 days.90 days.

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41