Homework Help for Prealgebra

Which of the following sets are rings with respect to the usual operations of addition and multiplication? If the set is a ring, is it also a field?

Solve for x:

x^2-5x+6=0

X+5=10 evaluate value of x

45×13+3+6=? 

x +15=5x+10

Calculate value of x

7×5+7×9=? Calculate 

4+2+5+2×6=?

8×5-4×6+78=?

3+6+7×8=? Calculate 

7×2×4×8 calculate 

11×5=? Calculate 

Find the answer:

x = 3 - y

x + y = 7

A person stands on a bathroom scale in an elevator. Rank the scale readings from highest to lowest based on the given information

about the speed y or the magnitude of the acceleration a. (a) ascending with increasing speed (a = 1.0 m/s2); (b) descending at

constant speed (v = 2 0 m/s): (c) descending at constant speed (v = 4.0 m/s) (d) descending with increasing speed

(a = 2.0 m/s2); (e) ascending with decreasing speed (a = 2.0 m/s2)