Lance lived in Portugal and Brazil for a total of 14 months to learn Portuguese. He learned an
average of 130 new words per month when he lived in Portugal, and an average of 150 new words
per month when he lived in Brazil. In total, he learned 1920 new words.
Write a system of equations to represent this situation. Use x to represent Portugal, and y to
represent Brazil.

i believe the correct answer is b.

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

answer: graph 2

step-by-step explanation: