emma5710
emma5710 emma5710
  • 04-08-2018
  • Mathematics
contestada

Plzzz Help with number 139 don’t understand

Plzzz Help with number 139 dont understand class=

Respuesta :

Аноним Аноним
  • 04-08-2018

2a + 2s = 32, 6a + 7s = 106

Solve for a in the first equation.

2a = 32 - 2s

a = 16 - s

Substitute a into the second equation.

6(16 - s) + 7s = 106

96 - 6s + 7s = 106

96 + s = 106

s = 10

Substitute s into the first equation.

2a + 2(10) = 32

2a + 20 = 32

2a = 12

a = 6

a = 6, s = 10

Answer Link

Otras preguntas

parallel lines need answer quickly
A picture frame has a perimeter of 100 cm. It’s width is 4 cm less than twice its length. What is the width of the picture frame? 18 cm 32 cm 48 cm 50 cm
Evaluate the expression. If x=12, y=8, and z=3 4x-yz
have you ever fallen down the stairs
If you (stay out) in the rain too long,you (get) sick
Pleass Please Help Very Important)Read the passage then answer the question. How does the author of " A Relay Race to Remember" use foreshadowing to create tens
A function is a rule that assigns each value of the ___ one value of the dependent variable.
5 sources about Cyber bullying Giving brainliest:)
electron configuration for potassium​
What does the Euphrates River symbolises? Is it drying up?​