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
Oksanka [162]
3 years ago
9

Solve the following system of equations.

Mathematics
1 answer:
Tomtit [17]3 years ago
4 0
There a number of methods in solving a system of equations. These methods are the substitution method, solving by graphing, gaussian elimination and by elimination method. For this case, we use the substitution method. To do this, we write one of the equation in a way where one variable is left on one side. We do as follows:

<span>−0.9x+0.5y=3.9 
0.5y = 3.9 + 0.9x
y = 3.9/0.5 + 0.9x/0.5
y = 7.8 + 1.8x

Then, we subsitute this equation to  variable y in the second equation. 
</span>0.4x+1.5(7.8 + 1.8x)=−6.9

Then, we solve for x
0.4x+1.5(7.8 + 1.8x)=−6.9
0.4x+11.7 + 2.7x=−6.9
3.1x = -18.6
x = -6

We substitute this value of x, to the first equation to solve for y
y = 7.8 + 1.8x
y = 7.8 + 1.8(-6)
y = -3


You might be interested in
A horse is 17 hands tall at the hand equals 4 inches how tall is the horse in inches
Lilit [14]
<h3><u>68 inches</u></h3>

Because we know how large each hand is, we can multiply the number of hands by the amount of inches each one represents to find the total number of inches.

17 * 4 = 68


8 0
3 years ago
Read 2 more answers
I'm so lost. I have no clue.
tiny-mole [99]
I supppose the answer is F(X)=X²+4, you can use the vertex to confirm.
7 0
3 years ago
Read 2 more answers
The time (t) it takes to clean an office building is directly related to the number of people (p) working. Which of the followin
Inessa [10]

Answer:

The time (t) it takes to clean an office building is <em><u>directly</u></em> <em><u>related</u></em> to the number of people (p) working.

t is proportional to p

t = kp \\  \boxed{\red{\frac{t}{p}  = k}}

3 0
3 years ago
Ben and Eva place stickers of animals on a large sheet of paper. Ben places 45 stickers on the paper. This is 5 times the number
OLga [1]

Answer:

9 stickers

Step-by-step explanation:

45/5=9

we divided 45 with 9 since __*5=45 and the figure out the__ we need to do the opposite operation(division)

8 0
3 years ago
Read 2 more answers
Simplify the square root of 272​
vladimir2022 [97]
If you are looking for the square root, which I’m assuming. It’s 4 square root of 17, or 16.492
8 0
3 years ago
Other questions:
  • 2 2/8 - 1 7/8 = ?<br>please help me ​
    15·2 answers
  • What is the third angle of a right triangle if one of the angles measures 51 degrees
    13·2 answers
  • Find the simplified form of the expression. give your answer in scientific notation (8x10^4)(9x10^-8)
    7·1 answer
  • In this polygon, which angle is an interior angle?
    14·2 answers
  • 3x+4y=5
    8·1 answer
  • Britney paid $4.50 for two mangoes and one bag of grapes. Finn paid $9.25 for three mangoes and two bags of grapes. Britney and
    13·1 answer
  • It takes the city train5 hours to go from the first stop to the last stop. The actual traveling time is 3 hours and the train st
    15·2 answers
  • Choose the SYNONYM of the vocabulary word.<br> bewilder
    12·2 answers
  • Please help me identify the terms and like terms
    15·2 answers
  • If you have 66 data observations in a sample, how many classes (bins) does the sturges' rule recommend for you to construct a fr
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!