1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anit [1.1K]
3 years ago
8

Solve the system by substitution. y= -x 10x+2y=40

Mathematics
1 answer:
patriot [66]3 years ago
6 0
The answer would be (5,-5) I think.
You might be interested in
Solve for x:<br><br> 2x + 30 = (30/10) * 5(2x + 3) + 87
Svetllana [295]
Answer:
x = -9.375
im not sure if i interpreted the times symbol right

step-by-step explanation:
2x + 30 = (30/10) • 5(2x + 3) + 87
2x + 30 = 3 • 10x + 15 + 87
2x + 30 = 105 • 10x
-2x -2x
30 = 105 • 8x
-105 -105
-75 = 8x
/8 /8
-9.375 = x ?
4 0
3 years ago
Read 2 more answers
Plz help me This is due tomorrow :)
Helga [31]
The answer C make more sense.
4 0
3 years ago
Read 2 more answers
Which of the following could be the equation of the function below?<br><br> Timed, please hurry
oksano4ka [1.4K]
Try The 3rd one I know it’s right
8 0
3 years ago
Solve the system using substitution . y =2x +4 , 2x - y = 6
babymother [125]

no solution

substitute y = 2x + 4 into the other equation

2x - (2x + 4) = 6 ( distribute and simplify )

2x - 2x - 4 = 6 ( add 4 to both sides )

0 = 10 ← not possible

Hence the system has no solution


6 0
3 years ago
Un boligrafo cuesta 30 ptas mas que un lapiz. Un muchacho ha comprado 8 boligrafos y 15 lapices. En total le han costado 700 pta
Firdavs [7]

Por un sistema de ecuaciones, tiene-se que:

  • Cada lapiz cuesta 20 ptas.
  • Cada boligrafo cuesta 50 ptas.

-------------------------

  • Considera-se un sistema de ecuaciones, con cada boligrafo custando x y cada lapiz custando y.
  • <u>Boligrafo cuesta 30 mas que un lapiz</u>, o sea, x = 30 + y
  • <u>8 boligrafos y 15 lapices cuesta 700</u>, o sea, 8x + 15y = 700

-------------------------

  • Aplicando el <u>primer ecuación en la segunda, </u>tiene-se el cuesto de cada lapiz:

8x + 15y = 700

8(30 + y) + 15y = 700

240 + 8y + 15y = 700

23y = 460

y = \frac{460}{23}

y = 20

Cada lapiz cuesta 20 ptas.

-------------------------

Por fin, el cuesto de cada boligrafo es dado por:

x = 30 + y = 30 + 20 = 50

Cada boligrafo cuesta 50 ptas.

Un problema similar es dado en brainly.com/question/24637096

4 0
3 years ago
Other questions:
  • Find the area of a circle with a radius of 6.7 m to the nearest square unit
    6·2 answers
  • find the length of each isosceles right triangle when the hypotenuse is of the given measure given 8cm
    11·1 answer
  • Anton bakes 36 cookies. He gives cookies to each of his 3 friends.
    6·2 answers
  • Use the distributive property to solve <br> 3,894 x6= ??
    10·1 answer
  • What decimal is 4 1/3?
    6·2 answers
  • At prom, Dina asks a boy to dance. A moment later, her friend decides to ask a boy to dance, too.
    15·1 answer
  • Frances spent $42 on a pair of shoes this was half of the original price
    11·2 answers
  • Find the ratio of 2 metre and 50 cm​
    7·1 answer
  • Please help :((<br> fillerfillerfiller
    11·1 answer
  • What number is 40% of 180?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!