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
Vilka [71]
2 years ago
13

Can anyone please help me with this? i need a step by step explanation please! very appreciated:)

Mathematics
2 answers:
d1i1m1o1n [39]2 years ago
8 0

Answer:

x=8 and y=31

Let's solve your system by substitution.

y=5x−9;y=3x+7

Step: Solve y=5x−9for y:

y=5x−9

Step: Substitute5x−9foryiny=3x+7:

y=3x+7

5x−9=3x+7

5x−9+−3x=3x+7+−3x (Add -3x to both sides)

2x−9=7

2x−9+9=7+9(Add 9 to both sides)

2x=16

2x/2=16/2 (Divide both sides by 2)

x=8

Step: Substitute 8 for x in y=5x−9:

y=5x−9

y=(5)(8)−9

y=31 (Simplify both sides of the equation)

Answer:

x=8 and y=31

NOTE: <u><em>Please give the brainly to the first answer</em></u>

<u><em /></u>

HOPE THIS HELPS <33333

-Silver

EastWind [94]2 years ago
5 0

Answer:

Step-by-step explanation:

x and y are variables. That means they represent numbers that are unknown. When we solve for x or y, we are trying to find what number the variable represents.

Y is a number that equals both 5x-9 and 3x+7. If it is a number, it can only have one value, so we can say that 5x-9 and 3x+7 have the same value.

In other words, 5x-9 = 3x+7.

Another way of thinking about this step is substitution. y=3x+7, so in the equation y=5x-9, we can replace the y with 3x+7. It will give 3x+7 = 5x-9.

In either case, we have this new equation

5x-9 = 3x+7.

From here it's just simple algebra- subtract 3x from each side

2x -9 = 7

and add 9 to each side

2x = 16

and divide each side by 2.

x = 8.

All these steps work because if two things equal each other, when you do the same thing to both of them (such as add 9), the new values will still equal each other.

Now that we know that x = 8, we can take one of the original equations

y=5x-9

and put 8 in for x.

y=5*(8) -9.

If x represents the value 8, we can obviously switch out x for 8.

Now simplify

y=40 -9

y = 31

Now we know that x = 8 and y = 31.

You might be interested in
A student drove to the university from her home and noted that the odometer reading of her car increased by 16.0 km. The trip to
notka56 [123]

Answer:

Average speed is 48 km per hour

Step-by-step explanation:

A student drove to the university from her home and noted that the odometer reading of her car increased by 16.0 km. The trip took 20.0 min. (a) What was her average speed? in km/hr

Distance traveled is 16 km and the time taken is 20 minutes

convert minutes into hour. to convert minutes into hour we divide by 60 because 1 hour = 60 minutes

\frac{20}{60} =\frac{1}{3}

so time = 1/3  and distance = 16

Average speed = distance by time

speed =\frac{16}{\frac{1}{3} } =\frac{48}{1}= 48

Average speed is 48 km per hour

4 0
3 years ago
A line passes through (4,5,) which points is also on the line
goldfiish [28.3K]

Answer:yeet

Step-by-step explanation:

5 0
3 years ago
Please help me guys I beg you I will give you lots of credit plz
IRINA_888 [86]

Answer:

11m/min

Step-by-step explanation:

slope of the line = velocity of the turtle

slope = y/x

= 55/5

=11

4 0
3 years ago
Read 2 more answers
F. Please answer this as soon as possible.
Liono4ka [1.6K]

Answer:

-12

Step-by-step explanation:

Convert the mixed number to an improper fraction.

-2\frac{2}{3} = -\frac{8}{3}

To divide, just multiply by the reciprocal.

So -2\frac{2}{3} ÷ \frac{2}{9} becomes -\frac{8}{3} ÷

Now you can multiply straight across.

-\frac{8}{3} × \frac{9}{2} = -\frac{72}{6}

And simplify.

-\frac{72}{6} = -12

Please mark as Brainliest! :)

7 0
3 years ago
Read 2 more answers
Which function could be represented by the graph on the coordinate plane? f(x) = (x – 8)2 6 f(x) = (x 8)2 6 f(x) = (x 8)2 – 6 f(
hjlf

Considering it's vertex, the quadratic equation that could be represented on the plane is given as follows:

f(x) = (x - 8)² - 6.

<h3>What is the equation of a parabola given it’s vertex?</h3>

The equation of a quadratic function, of vertex (h,k), is given by:

y = a(x - h)² + k

In which a is the leading coefficient.

Researching the problem on the internet, it is found that the given graph has vertex at (8,-6), hence <u>h = 8, k = -6 and considering a = 1</u> the equation is given as follows:

f(x) = (x - 8)² - 6.

More can be learned about the vertex of a quadratic equation at brainly.com/question/24737967

#SPJ4

7 0
2 years ago
Other questions:
  • If an object that is 85 ft. long is represented on a scale drawing as a line 5 in. long, what is the scale used to make the draw
    7·1 answer
  • Find 39% of 65......
    10·1 answer
  • 1 ten thousand+19thousands+2tens+9ones
    9·1 answer
  • PLEASE HELP!!
    6·1 answer
  • An airplane travels 720 in 3 hours with the wind. The return trip against the wind takes 4 hours. What is the wind speed and the
    7·1 answer
  • The ratio of men to women in a certain factory is 3 to 4. There are 210 men
    12·1 answer
  • Solve <br><img src="https://tex.z-dn.net/?f=y%20%7B4%20-%202y%20%7B3%20%3D%200%7D%5E%7B%3F%7D%20%7D%5E%7B%3F%7D%20" id="TexFormu
    9·1 answer
  • I need some assistance please
    7·1 answer
  • Can some give me the anwsers
    15·1 answer
  • Someone please help this is due in an hour
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!