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

36 is what percent less than 48?

whats 168,356 rounded to the nearest ten thousand

what is the reference angle of 330° degrees

Going into a recent election, only about 62% of people old enough to vote were registered. In a community of about 55,200 eligible voters, how many people were

Experts agree that the minimum time period for cardiorespiratory benefit from exercise is _______ minutes. A. 20B. 10C. 60D. 30

what is the best way to find out the subject of a map

whats 168,356 rounded to the nearest ten thousand

What is the subject and predicate of this sentence. she cooked breakfast over the camp fire

What's the difference between acceleration and velicity?

What mass of water will fill a tank that is 100.0 cm long, 50.0 cm wide, and 30.0 cm high? Express the answer in grams.