Tenho prova amanhã de Progressão Aritmética, mas não entendi essa questão! Determine o valor de x, de modo que os quadrados dos números (x+1), Vx+15 e (x+3) formem,
nessa ordem, uma PA.
(Vx+15, o V representa uma raiz)

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Ineed an anime drawing of summer corrin. will award brainliest.

Portraits are considered extremely important in early history because they were ?

Acurator decides to display an eighteenth-century painting in a windowless room with controlled temperature and humidity. pick the answer that best describes the reasons for her choice: (1 point) 1)the curator wants to make sure that the temperature and humidity are comfortable for visitors. 2)keeping the temperature and humidity at a set level will save money. 3)the ultraviolet rays will damage the painting by fading and flaking the paint. 4)ultraviolet rays will fade the paint pigment and high temperature and humidity will damage the paint.