The difference of 5 times a number and 8 is 27. which equation below can be used to find the unknown number?
a. (8 − 5) − n = 27
b. 8 − 5n = 27
c. 5n − 8 = 27
d. 8 + 5 − n = 27

Hundred and tens tables to make 430 in five different ways

Write the equation of the circle centered at (10,-2) with radius 2

Amanufacturer knows that their items have a normally distributed lifespan, with a mean if 9.1 years, and standard deviation of 2.9 years. if you randomly purchase one item, what is the probability it will last longer than 10 years?