Evaluate the following expression and choose the correct answer from the options given below:

( 4× 5 ) / 8 + 2 - ( 3 / 4 )

Ron bought 4 books B1, B2, B3 and B4 for $450. The price of two books, B1 and B3 is the same. The price of B2 is twice the price of B1. Find the price of book B4 if the price of Book B1 is $75.

Evaluate the expression: 3a - 4b + 6c + a - 2b - 2a + 3b - 4c + a + 2c

What will be the answer after the negation of 365, 450 - 472, - (340 - 288 ), and ( 689 - 340 ) respectively?

Check whether the equation is valid or not: 5a - 2b + 6c = 3a + 30 for a = 2,b = 2,c = 5.

What will be the value after solving the expression: 4 × 1 / 4 + 1 / 4a for a = 2 ?

What will be the result after solving the expression: (ax + b + cy)(2a + 3b + c)

Simplify 1/[(1/√2)+(1/√3)] and choose the answer from the options given below.

What will be the value of the following expression: 75ax /15bx given that a, b, and x are variables.

Check if the following equation is valid or not. (5x + 2y)3=125x3 + 8y3 + 150x2y + 60xy2

What is the value of 8a4 for a = 3?