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
Sveta_85 [38]
3 years ago
9

What's the value of x and y when 4x+y=210 and 3x+2y=195?

Mathematics
2 answers:
noname [10]3 years ago
8 0
After substitution method, I got x=45 and y=30
adell [148]3 years ago
7 0
You already hve the answer, but you do this by turning the equation into standard form. Since we are isolating y for each linear equation, we must first subtract the 4x and 3x on both sides. This should come out to y=-4x+219 and 2y=-3x+195. Since we have our first equation in standard form, all we have go do is divide 2 on both sides frome the second equation. Then you can solve by substitution (y=y)
You might be interested in
After 5 years, a $2,450 investment is worth $3,123.75.
kondaur [170]

Answer:

5.5%

Step-by-step explanation:

To solve this problem we can use a modified version of the simple interest formula which is shown below:

r=\frac{I}{Pt}

<em>I = interest amount</em>

<em>P = principal amount</em>

<em>t = time (years)</em>

<em />

The first step is to find the interest gained from the investment.

3,123.75-2,450=673.75

Next, plug in the values into the equation:

r=\frac{673.75}{(2,450)(5)}     Multiply the bottom values

r=\frac{673.75}{12,550}         Divide the values

r=.055

The last step is to convert 0.055 into a percent:

0.055(100)=5.5

The interest rate is 5.5%

3 0
3 years ago
A particular car gets fuel mileage of 36 mpg in the city and 12% more on the highway.
liq [111]
40.32 mpg, because 36x.12=4.32 + 36= 40.32
5 0
3 years ago
4+c=0<br> can you please help me?
Lera25 [3.4K]

Answer:

c= -4

Step-by-step explanation:

4+c=0

1)c+4=0: Rearrange the expression

2) c=0-4: Separate the constants and variables

3) c= -4: Add or subtract zero

Hope that helps :)

5 0
3 years ago
What is not true about unit rates?
nydimaria [60]

Answer:

One thing that is not true would be:

  • There isn't a 1 in a unit rate

Step-by-step explanation:

  • There is actually a 1 (specifically in the denominator) because the word unit means 1

Hope this helps :)

6 0
3 years ago
The human body contains about ​ bacteria.
dolphi86 [110]
The answer of this problem is
6 0
3 years ago
Other questions:
  • a 4inch wide by 6inch long picture is placed on a solid mat that forms a frame around it. the mat is 8 inches long. the mat and
    15·1 answer
  • A number that can be written as a/b where a and b are integers, but b is not equal to zero
    14·1 answer
  • Find the difference between 3/4 and 5/8
    10·2 answers
  • Three of the vertices of a rectangle have coordinates (-1, -1), (6, -1), and (-1, 2). What are the coordinates of thefourth vert
    13·1 answer
  • Question 3: A small window in a barn is shaped like a parallelogram. The height of the window is half the length of the base of
    10·2 answers
  • Divya is organizing a training for two different seminars, one for teachers and one for mechanics. She has a total of 132 pens a
    10·1 answer
  • Aanya wrote the four equations that are shown below. She examined them, without solving them, to determine which has exactly one
    9·2 answers
  • What does 1.4[8(28+35)] equal
    15·2 answers
  • Try to anwer this! i need helo alot of points if its correct &lt;3
    8·1 answer
  • No links please!<br><br><br> If f(x) =x^4+5 then what is the remainder when f(x) is divided by x+5?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!