allisonargonzalez allisonargonzalez

08-12-2021
Mathematics

contestada

please help asap !!
Solve the system of equations 2x + 3y = 40 and -2x + 2y = 20 A.x = 10 , y = 20 B. x=-10 , y = 20 C. x = -6 , y = 4 D. x = 2 , y = 12

Respuesta :

tinybooyah tinybooyah

10-12-2021

Answer:

D is answer

Step-by-step explanation:

-2x + 2y = 20

2x = 40-3y

so -(40-3y)+2y =20

-40+3y+2y = 20

5y = 60

y = 12

2x = 40-3y

2x = 40-3(12)

2x = 40-36

2x = 4

x = 2

so x = 2 , y = 12

Answer Link

Otras preguntas

What was the importance of Constantinople?

The change in isotopes over time due to the emission of radioactive particles is known as A. radioactive decay. B. half-life. C. radiometric dating. D. absolute

The United States has the most aggressive programs in place to reduce carbon emissions of any other country. True False

Which type of isometry is the equivalent of two reflections across intersecting lines? A. glide reflection B. rotation C. reflection D. none of these

Write a personification of the beach.

What materials is used to bind early tempera to the painting surface

If a solid line represents a covalent bond and a dotted line represents intermolecular attraction, which of these choices shows a hydrogen bond? -O, H-C- -N

Use VSEPR theory to predict bond angles in the following covalent bond molecules. a. methane b. ammonia c. water

How many literary theories are still acceptable to use in literary analysis? All literary theories are acceptable to use. Five literary theories are still in u

According to some historians, which marks the beginning of the US Civil War? A. the battle of Antietam B. the battle of Bunker Hill C. the battle of Fort Sum