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
earnstyle [38]
3 years ago
9

X + 8y = 18 and — 5x + 3y = -4

Mathematics
2 answers:
atroni [7]3 years ago
5 0
X+8y=18
-5x+3y=-4

Multiply the first equation by 5
Add the two equations together

5x+40y=90
-5x+3y=-4
43y=86
Y=2

Plug y into one equation to find x
X+16=18
X=2
yaroslaw [1]3 years ago
3 0

X+8y=18

-5x+3y=-4

Multiply the first equation by 5

Add the two equations together

5x+40y=90

-5x+3y=-4

43y=86

Y=2

Plug y into one equation to find x

X+16=18

X=2

You might be interested in
Please answer the question
Maslowich

Answer:

Check pdf

Step-by-step explanation:

Download pdf
6 0
3 years ago
An irregularly shaped rock was lowered into a graduated cylinder holding a volume of water equal to 50 ml. The height of the wat
enyata [817]

5 grams per cubic centimeter

3 0
2 years ago
rita bought 5 pairs of sock.each pair cost $ 4.how much did rita spend on socks.explain how you know​
Alla [95]
Rita spent 20$. By multiplying 5 pairs with 4$ we can see that it will equal 20$
8 0
3 years ago
Read 2 more answers
Define the term of mathematics ?​
Mashutka [201]

Answer:

it is the abstract science of number, quantity and space, either as abstract concept

3 0
3 years ago
I need how you found the answers?
lara31 [8.8K]

Answer:

2x + 6 = -18

x + 1 = -11

3x = -36

Step-by-step explanation:

First find the solution! Then you can create your own equations

2x+9=-15

2x=-24

x=-12

Thus u need solutions with:

x = -12

Knowing the equation of a line as:

y = mx + b

we can can start by making y = -12 (our solution)

mx + b = -12

Now we can pick a value for m and b by adding and miltiplying on both sides

We do this to keep both sides equal.

if we make m = 2 and b = 3:

2x + mb = -12*m + 2b

2x + 6 = -24 + 6

2x + 6 = -18

Solving this we also get x = -12, as we expect.

An alternative way to think about it is to imagine that we start with a simple equation and make it more complex. We have our solution:

x = -12  => lets add a b value!

x + b = -12 + b => Lets add a slope (m)

xm + bm = -12m + bm

Giving values for this can give you multiple equation of the same solution.

General Formula:

m(x+b) = m(y+b)

mx + bm = my + bm

8 0
3 years ago
Other questions:
  • Name another way to prove a quadrilateral is a rectangle.
    10·1 answer
  • The interior angles formed by the sides of a hexagon have measures that sum to 720 degrees. What is the measure of angle F?
    8·2 answers
  • If 400 students at the school took the SAT, how many scored in the 1301 to 1600 range?
    14·1 answer
  • You want to save $20,000 to buy a new boat. You deposit $12,500 in an account earning 6.5% simple interest. After how long will
    11·1 answer
  • 7(-8)-2y=-52<br><br><br><br><br><br> help....
    14·2 answers
  • Is (2,3) a solution to 2x+4y=14 <br> 3x-2y=2
    5·2 answers
  • On graph paper, draw diagrams of a+a+a+a and 4a when a is 1, 2, and 3. What do you notice?
    10·2 answers
  • Danni is training for a marathon. Her target speed is 25 miles per hour. She currently runs 15 miles in 1/2 and hour. Does she a
    9·1 answer
  • Find the measure of c
    13·1 answer
  • What are the next 4 multiples of 4/8 in a fraction
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!