(CMDPII) Sobre os conceitos de equações, julgue o item a seguir em C para CERTO ou E para ERRADO.
O sistema
(2x = +3y = 2
(-x - 3y = 2
Tem como solução (4,-2)
O C. Certo
E. Errado

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x

The measures of the angles in △abc are given by the expressions in the table. angle measure angle a 65° angle b (3x−10)° angle c (2x)∘ find the value of x. then find the m∠b and m∠c.

Atourist boat is used for sightseeing in a nearby river. the boat travels 2.4 miles downstream and in the same amount of time, it travels 1.8 miles upstream. if the boat travels at an average speed of 21 miles per hour in the still water, find the current of the river.