MinnieTewksbury497 MinnieTewksbury497

04-06-2015
Mathematics

contestada

3x + y = 19 , and x + 3y = 1. Find the value of 2x + 2y
a. 20
b. 18
c. 11
d. 10
e. 5

Respuesta :

04-06-2015

[tex]3x+y=19 \\ x+3y=1 \\ \\ \hbox{add the sides of the equations:} \\ 3x+x+y+3y=19+1 \\ 4x+4y=20 \\ \\ \hbox{divide both sides by 2:} \\ 2x+2y=10[/tex]

The answer is d. 10.

Answer Link

Otras preguntas

One wall of Marsha’s greenhouse contains a window. What is the area of this wall of the greenhouse not including the area of the window?

In the given right triangle, find the length of the hypotenuse, AB, if BC = 6 and AC = 5.

Why was reducing the tariff important to Cleveland during his first presidential term?

Line p and q are parallel lines. The slope of line q is -3. Determine the slope of line p.

The ________ oversees the coast guard, the u.s. citizenship and immigration services, the secret service, and the federal emergency management agency. a. u.s

In the diagram above (not to scale), Vx/y = 12.57 meters/second and Vy/z = 5.21 meters/second. What is the value of the resultant vector ?

Propose how you,as young person,could prevent human rights violations from taking of sports personalities rights by the media

In both ancient Athens and early United States citizenship initially it was

The commercial jetliner industry, consisting of boeing and airbus, would best be described as a (an

Which of the following is an example of an Arrhenius base? KCl Ca(OH)2 HCl