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
Firlakuza [10]
2 years ago
8

Solve the system of equations 4x+5y=-14 and -5x-8y=10 by combining the equations.

Mathematics
1 answer:
Katarina [22]2 years ago
6 0

The solution of the system is:

x = 62/7

y = 30/7

<h3>How to solve the system of equations?</h3>

Here we have the system:

4x + 5y = -14

-5x - 8y = 10

To solve it by combining the equations, we need to try to remove one of the variables.

If we take the sum of 5 times the first equation and 4 times the second equation we get:

5*(4x + 5y) + 4*(-5x - 8y) = 5*(-14) + 4*10

If we simplify that we get:

20x  + 25y - 20x - 32y = -30

-7y = -30

Now we can solve that for y:

y = -30/-7 = 30/7

Now to get the value of x, we can replace the value of y in any of the given equations:

Using the first one:

4x + 5y = -14

x = (-14 - 5y)/4

x = (-14 - 5*30/7)/4 = (-98/7 - 150/7)/4 = 248/28 = 124/14 = 62/7

The solution of the system is:

x = 62/7

y = 30/7

If you want to learn more about systems of equations:

brainly.com/question/13729904

#SPJ1

You might be interested in
2. LIST THREE DIFFERENT TYPES OF ORGANISMS THAT USE CELLULAR RESPIRATION? MAKE THEM AS DIFFERENT AS POSSIBLE.
OLEGan [10]
<h2>1) Plants</h2><h2>2) Animals</h2><h2>3) Humans</h2>
7 0
3 years ago
What’s the slope of 10,6 and 4, 1.2
Kruka [31]

let's firstly change the 1.2 to a fraction

1.\underline{2}\implies \cfrac{12}{1\underline{0}}\implies \cfrac{6}{5} \\\\[-0.35em] ~\dotfill\\\\ (\stackrel{x_1}{10}~,~\stackrel{y_1}{6})\qquad (\stackrel{x_2}{4}~,~\stackrel{y_2}{\frac{6}{5}}) \\\\\\ \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{\frac{6}{5}}-\stackrel{y1}{6}}}{\underset{run} {\underset{x_2}{4}-\underset{x_1}{10}}}\implies \cfrac{~~ \frac{6-30}{5}~~}{-6}\implies \cfrac{~~ \frac{-24}{5}~~}{-6}\implies \cfrac{~~ -\frac{24}{5}~~}{-\frac{6}{1}}

-\cfrac{\stackrel{4}{~~\begin{matrix} 24 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}}{5}\cdot -\cfrac{1}{\underset{1}{~~\begin{matrix} 6 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}}\implies \boxed{\cfrac{4}{5}}

4 0
3 years ago
Which of the following describes the graph of a linear function?
Aliun [14]
I'm not to sure maybe b ?
6 0
3 years ago
In a statistics class there are 18 juniors and 10 seniors; 6 of the seniors are females and 12 of the juniors are males. If a st
Natasha_Volkova [10]

Answer:

P(a junior or a senior)=1

Step-by-step explanation:

The formula of the probability is given by:

P(A)=\frac{n(A)}{N}

Where P(A) is the probability of occurring an event A, n(A) is the number of favorable outcomes and N is the total number of outcomes.

In this case, N is the total number of the students of statistics class.

N=18+10=28

The probability of the union of two mutually exclusive events is given by:

P(AUB)=P(A)+P(B)

Therefore:

P(a junior or a senior) =P(a junior)+P(a senior)

Because a student is a junior or a senior, not both.

n(a junior)=18

n(a senior)=10

P(a junior)=18/28

P(a senior) = 10/28

P(a junior or a senior) = 18/28 + 10/28

Solving the sum of the fractions:

P(a junior or a senior) = 28/28 = 1

4 0
3 years ago
Mike plans to paint a wall in his living room blue.that wall measures 10 feet tall and 8 feet wide.what is the area of the wall
Lorico [155]

Answer:

Step-by-step explanation:

L x W

10 x 8

<h3>80ft squared </h3><h3 /><h3 /><h3 />
5 0
3 years ago
Other questions:
  • How much horsepower would the Challenger Hellcat Redeye Widebody need to run the speed of sound arrive before the sound of its l
    9·2 answers
  • 0.0003 is 1/10 of what decimal
    15·1 answer
  • Mario painted 2/6 of the wall in his bedroom. Mei Lyn painted 2/4 of a wall in her bedroom.
    13·1 answer
  • 2/9 - 1/3 in simplest form please.
    5·2 answers
  • Which represents the sum of the geometric series 4+12+36+108+...+78,732
    13·1 answer
  • Write the equation of the ellipse with center (4,2), vertex (9,2), and focus (4+2sqrt5,2)
    5·1 answer
  • Dan was thinking of a number. Dan doubles it and gets an answer of 34.7. What was the original number?
    13·2 answers
  • Pls help solve this...No hacker links
    7·2 answers
  • There are 15 boys and 16 girls in Gabriel’s class. One person is chosen at random. What is the probability that the person chose
    7·1 answer
  • A librarian knows that 45% of the books currently
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!