lillyanp3525 lillyanp3525
  • 26-05-2022
  • Mathematics
contestada

solve the system using substitution. show all work. {4x + 5y = 7 {y = 3x - 10

Respuesta :

Аноним Аноним
  • 26-05-2022

Answer:

x = 3, y = -1.

Step-by-step explanation:

4x + 5y = 7

y = 3x - 10

Substitute for  y = 3x - 10 in the first equation:

4x + 5(3x - 10) = 7

4x + 15x - 50 = 7

19x = 7 + 50 = 57

x = 57/19 = 3.

Now plug x = 3 in the second equation

y = 3(3) - 10

y = 9 -10

y = -1.

Answer Link

Otras preguntas

What has been found regarding the impact of sleep on people's ability to perform a sequenced finger-tapping task? a. practicing two skills on the same day can i
What is the quotient?
Solve for x for 0 ≤ x < 2 π . cotxcosx - cotx = 0 0 Pi/2 Pi 3Pi/2 2Pi
The kite is made of two triangles. Are they isoscele, equilateral, or scalene triangles?
Which phrase correctly defines consumer segmentation? A. segregating a market into subdivisions of consumers that have common needs B. segregating a market into
Pls help I don’t understand and I’m being timed
Cleo wants to join a gym. There is an initial fee of $24.99 and each month of membership costs $12.50. If Cleo pays $ 174.99. How long will his membership last?
Simplify (−2)∙(2a−b)+3(a+b) PLz and Thanks
Can someone pls me help
help me with english please