elliflinchum elliflinchum
  • 03-12-2019
  • Mathematics
contestada

Look at this system of equations.
2x +5 =9.5
3x + 5y =10.5
What is the value of x+y

Respuesta :

kkkk1313 kkkk1313
  • 03-12-2019

Answer:

x = 2.25 y = 0.75

Step-by-step explanation:

2x = 9.5- 5

2x = 4.5

x = 4.5 ÷ 2

x = 2.25

know we now what is x so in the second one we evaluate x

3(2.25) + 5y = 10.5

6.75 + 5y = 10.5

5y = 10.5- 6.75

5y = 3.75

y = 3.75 ÷ 5

y = 0.75

that's it !

if you want to check your answer you can evaluate x and y so it will be like

2×2.25 + 5

= 4.5 + 5 = 9.5

and

3× 2.25 +5×0.75

= 6.75 + 3.75 = 10.5

Answer Link

Otras preguntas

7x - y = 4 Slope-Intercept Form:
2x + 2x - 5- 2 - 3x - 2x
What does f equal in the equation: -4(2f-6)=-9f+7f
Rectangle A has length 3 and width 5. Rectangle B has length 12 and width 20. Is Rectangle B a scaled copy of Rectangle A? If so, what is the scale factor? No,
What is the equatipn of the linear graph? (-4, 6). (1, -9)
Three ways that scientists can ensure their results and reliable
Why it was so important for the founders to include a bill of rights in the constitution
Question 2 of 5 Which two ratios represent quantities that are proportional? O A. 1 and 10 B. 56 64 and 36 48 14 c. and and 12 D.
How did railroads change ideas about travel? O A. The government had more control over where people could go. B. Traveling to far places took longer by train th
which term best describes a figure formed by three segments connecting three noncollinear points? A.Triangle,B. Vertex,C. Angle, D. Obtuse​