Question 1 and 2 have the same question help please!!

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

The value of cos 30° is the same as which of the following?

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.