In a science experiment the temperature of a substance is changed from 42 °F to - 54 °F at an average rate of - 12 degrees per hour. Over how many hours does the change take place? The answer is 8 hours I need the work for it though.

Expand 2x - 5 and x-3

Identify the solution of the system - 3x - 4y=2 8y=-6x-4

What does the variable p represent in the example problem?

What is 4km-280m equal to

What is syntax error from line 1 column 53 to line 1 column 60. unexpected '0'. expressed as the quotient of two integers in simplest form?

Emilia lost $4,000 in personal belongings due to a flood at her apartment complex. Fortunately, she had renter's insurance with a $500 deductible. How much would she receive from the insurance company if her maximum coverage was $10,000? $4,000.

Solve for x. 5x^2=-19x-12

If a company is considering the purchase of a parcel of land that was acquired by the seller for $93,000 is offered for sale at $166,000, is assessed for tax purposes at $103,000, is recognized by the purchaser as easily being worth $156,000, and is

P = ? 4p + 2 = 3p - 7

Larry mixed 15 grams of salt with 210 grams of a 5% salt solution in water. What is the percent of salt in his new solution?