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
The non-negative root of a number is called
zlopas [31]
A non-negative root of a number is called Square Root
4 0
3 years ago
Read 2 more answers
4.22 x 1o^6 + 2.25 x 10^5 + 2.8 x 10^6
denpristay [2]
7245000...hope that helps
8 0
3 years ago
Consider a parallelogram in which one side is 3 inches long, another side measures 4 inches, and the measurement of one angle is
goldenfox [79]

Answer:

Only one parallelogram can be drawn based on the given conditions.

Step-by-step explanation: just believe me

7 0
2 years ago
The copy machine takes 3 hours to make 24 copies of an information packet. How long would it take to make 96 copies?
kompoz [17]
It would take 12 hours
4 0
2 years ago
What’s a Equlivant fraction for 2/8 3/8 and 4/8<br><br> Need ASAP<br> Thanks
DaniilM [7]

To get the equivalent fractions, you simply have to multiply the fraction with another fraction that would equal to 1.

2/8 x 2/2 (this is equal to 1) = 4/16; 1/4

3/8 x 2/2 = 6/16; 9/24

4/8 x 2/2 = 8/16; 1/2

7 0
3 years ago
Other questions:
  • The following is the probability mass function for the number of times a certain computer program will malfunction: 0 1 2 3 4 5
    6·1 answer
  • It takes Alexandra 2 hours and 44 minutes to cut the grass. Austin needs 3 hours and 14 minutes to cut the grass. If they work t
    13·1 answer
  • 2p²q³×5pq÷10p³q⁴ PLEASE SOLVE THIS EQUATION WITH WORKING. THANK YOU!
    7·1 answer
  • An ice cream shop sells cones at the volume of 94.2 cubic meters they want to double the volume of the cones without changing th
    13·1 answer
  • The slope-intercept form of an equation is y = mx + b. rewrite the equation in terms of the slope m
    6·1 answer
  • The Widget Company is planning to produce widgets. The company has rented space for its manufacturing operation at $4,000 per mo
    15·1 answer
  • Judy simplified the expression (3x + 1)(x – 3) – (2 – 2x2 – 3x). What is the constant term in the simplified expression?
    7·1 answer
  • Suppose you estimated square root of 12 by averaging a square like rectngle.What would be a reasonable estimation?​
    15·1 answer
  • (1.1/1.2: Interpolating polynomials) Say we want to find a polynomialf(x) ofdegree 3,f(x) =a0+a1x+a2x2+a3x3,satisfying some inte
    15·1 answer
  • Can someone help me
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!