Prove that with any natural number n (5n-4)^2-(2n+11)^2 divides by 21

The sum of two numbers is 58. the first number is 8 less than half the second number. let  c  represent the first number. let  drepresent the second number. which statements about solving for the two numbers are true? check all that apply.the equation    represents the sum of the two numbers.the equation    represents the sentence “the first number is 8 less than half the second number.”the equation    represents the relationship between the two numbers.the equation    represents the sum of the two numbers.the number  d  is 14.the number  c  is 44.the number  c  is 14.the number  d  is 44.

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

Will gve pints stars and brainliest