Can someone please answer my question? i have been working on school work all day. here is 30 points just please answer all my questions that i post and i will give more

Write the sum, and then write an equivalent expression by collecting like terms and removing parentheses.

b. 2x - 7 and the opposite of 2x

Use the inverse of the function y=x^2-18x to find the unknown value [tex]y = \sqrt{bx + c \: + d} [/tex]

Write an introductory paragraph for this corrie ten boom and her family were faced with some difficult choices after hitler came to power. some family members paid the ultimate price. write a carefully thought-out paper of at least 200 words dealing with the following concepts: --how should a christian act when evil is in power? --what do you think it would be like to live in an occupied country? remember to proofread anything you write thoroughly.

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8