# Tutor profile: Abigail J.

## Questions

### Subject: Pre-Calculus

Simplify this equation: (2x+8y)^2

First, we need to expand this equation to get a better look at it. Since it is to the second power, we need to write out the equation again since it is essentially being multiplied by itself. (2x+8y)(2x+8y) Now, we multiply the first and second equations. This is done by multiplying the first 2x by everything in the second equation and doing the same for 8y. This will result in an equation like this: 4x^2 + 16xy + 16yx + 64y^2 All we have left to do is simplify! Since 16xy and 16yx are the same, we just add them to get the following simplified equation: 4x^2 + 32xy + 64y^2

### Subject: Basic Math

Solve the equation for x: 12x + 2 = 18 + 4x

12x + 2 = 18 + 4x -> First, we isolate X to one side of the equation by subtracting 4x from both sides. 12x + 2 = 18 + 4x -4x -4x 8x + 2 = 18 -> We need to isolate X further by subtracting 2 from both sides -2 -2 8x = 16 -> Lastly, we need to divide both sides by 8 in order to isolate and solve for x. 8x/8 = 16/8 x = 2 The answer to this question is x = 2

### Subject: Biology

Rosalind Franklin and Maurice Wilkins were important scientists when it came to understanding genetics and DNA. What were their contributions that further helped our understanding of DNA?

Franklin and Wilkins used X-Ray diffraction to study the DNA molecule. With this method, they were able to see the shape and pattern of DNA which gave critical information to scientists of this time. They discovered that DNA is long and thin, is a double helix that twists, and contains repeating subunits that make up the base of DNA.

## Contact tutor

needs and Abigail will reply soon.