If 4x^2 - bx + 81 is a perfect square trinomial. Then the value of b is

What is 10 dived by 5 thirteenths

Simplify (5 + 5) squared - 17-3

Classify each polynomial by its degree and by its number of terms (i. e. cubic or degree=3; trinomial. (a) 5x^4-8 (b) 4a^2-2a-16 (c) 9m^3

What type of probability uses a knowledge of sample spaces as opposed to observations to determine the numerical probability of an event?

A submarine was situated 800 feet below sea level. If it ascends 250 feet, what is its new position?

Explain in words how to change a fraction to a percent

There are 3 strawberry ice creams, 4 chocolate ice creams, and 7 vanilla ice creams on a tray. barbara selects 2 ice creams at random without replacement. what is the probability that she selects 2 chocolate ice creams?

Sandy works at a store that sells clothing accessories. The supply function for scarves is P = Q-9, where Pis the price and Q is the quantity of scarves. If Sandy sells the scarves for $12 apiece, how many scarves will the store supply?

Store A: $25 for a 45 minute lesson Store B: $30 for a 1 hour lesson Store C: $45 for a 1.5 hour lesson Store D: $80 for three 1 hour lessons Julie wants to purchase swim lessons for her son. There are four different stores that offer swim lessons.

What percent of 123 is 140