Solve for x. -2x-5=4.

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.

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?