What is the value of x?

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If 20% of a number is 35, what is 50% of that number?

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?