DISD CA 8 Math Unit #1: Numerical Relationships_2020 N CALCULATOR
COLOR THEME
ZOOM
ОАО
(8.2A) Which of the following sets contain only
rational numbers that are integers?
11.
{6,-3, 1.25)
O
{8, 4, 0.5)
{-8, 5, 0.5)
6.-8, 7, VO}
CLEAR ALL

Solve the equation using the zero-product property. -3n(7n - 5) = 0 a. 0, -5/7 b. -1/3, -5/7 c. -1/3, 5/7 d. 0, 5/7

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square