Can Somone Explain?

What value from the set {4, 5, 6, 7, 8} makes the equation 8x + 1 = 57 true? Show your work

In 2010, the continent of South America had a population of 395,280,204 which of the following is th closest estimate of this number

How to write 7/9 as a decimal

The formula for the area of a triangle is A = (1/2) bh where b is the base of the triangle and H is the height of the triangle. If all measurements are in meters find the height of the triangle if the area is 78 m² in the base is 12 m

Describe what is meant by the slope of a nonverticle line

Find the value of Y when x equals - 30 -2x-3y=42

The surface area of 10ft 7ft 10ft

Find the diameter and radius of a circle given the approximate circumference of 38 meters. (3.14 for pi) Sorry for these questions but I just don't understand them; -;

A jar contains 6 red marbles, 12 blue marbles, and 2 green marbles. if one marble is selected at random, find the probaility of select: a blue or a green marble

is - 0.28764 rational or irrational and how do you figure that out?

Whats the nearest 100 to 469019