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
maksim [4K]
3 years ago
10

Solve by the substitution method y=3x-12 2x-3y=-13

Mathematics
2 answers:
posledela3 years ago
4 0
Y=3x-12......(1)
2x-3y=-13...(2)

substitute y in eqn 2
2x-3(3x-12)=-13
2x-9x+36=-13
collect like terms
36+13=9x-2x
49=7x
x=49/7=7
x=7
solve for y in eqn 1 where x=7
y=3(7)-12
y=21-12=9
y=9
Neporo4naja [7]3 years ago
3 0
<span>y=3x-12
2x-3y=-13
substitute </span>y=3x-12 into <span>2x-3y=-13

</span><span>2x-3y=-13
</span>2x-3(3x-12)=-13
2x - 9x + 36 = -13
-7x = -49
   x = 7

y=3x-12 = y=3(7) -12 = 21 - 12 = 9

answer
solution
x = 7 and y = 9
You might be interested in
The triangles are similar. What is the value of x? Enter your answer in the box. x =
notsponge [240]

Answer:

Value of x is used to consider unknown value. The letter “x” is commonly used in algebra to indicate an unknown value. It is referred to as a “variable” or, in some cases, a “unknown.” In x + 2 = 7, x is a variable. ... A variable need not be “x,” but might be “y,” "w," or any other letter, name, or symbol.

6 0
3 years ago
There are 207 students in 9 classes at east middle school at this rate how many students are in 6 classes
patriot [66]

Answer:

138 students

Step-by-step explanation:

207/9 = 23

23*6=138

4 0
2 years ago
Read 2 more answers
Which of the following lines is perpendicular to y = -5x - 2?
kykrilka [37]
Answer: c is perpendicular to y = -5x - 2

Explanation: The slope of a perpendicular line is an opposite reciprocal of the original slope/line. (Basically switch the numerator and denominator and the sign. In this case, the slope is -5/1x. It’s opposite reciprocal is 1/5x.)

You can take a look at my notes for further clarification. Hope this helps!
5 0
3 years ago
Find f such that the given conditions are satisfiedf’(x)=x-4, f(2)=-1
kicyunya [14]

Given:

f^{\prime}\left(x\right)=x-4,\text{ and}f\left(2\right)=-1

To find:

The correct function.

Explanation:

Let us consider the function given in option D.

f(x)=\frac{x^2}{2}-4x+5

Differentiating with respect to x we get,

\begin{gathered} f^{\prime}(x)=\frac{2x}{2}-4 \\ f^{\prime}(x)=x-4 \end{gathered}

Substituting x = 2 in the function f(x), we get

\begin{gathered} f(2)=\frac{2^2}{2}-4(2)+5 \\ =2-8+5 \\ =-6+5 \\ f(2)=-1 \end{gathered}

Therefore, the given conditions are satisfied.

So, the function is,

f(x)=\frac{x^{2}}{2}-4x+5

Final answer: Option D

6 0
1 year ago
HELP ASAP PLEASE! Accounting class! Lorge Corporation has collected the following information after its first year of sales. Sal
abruzzese [7]

Answer:

what is thia

Step-by-step explanation:

i have no idea what you juat said like fr what topic is this im too bored to read the queation

3 0
3 years ago
Other questions:
  • Simplfy 4y-6(4z-5y)-4z
    10·1 answer
  • The table below shows all of the possible outcomes for rolling two six-sided number cubes.
    12·2 answers
  • Need help please :)
    15·2 answers
  • Dave determines the meal he ordered at the restaurant contains 14% of his daily sodium intake. If the meal contains 185 mg of so
    15·1 answer
  • Which of the following retirement plans places a maximum amount that an individual can contribute to the fund in a given year at
    12·2 answers
  • The diagram shows the number of dollars each child has a family how can you redistribute the money oth at each child
    13·1 answer
  • Mathew ran 3/8 mile and then walked 7/10 mile which pair of fractions can he use to find how far he went in all
    10·1 answer
  • Determine if 75 is rational or irrational and give a reason for your answer.
    7·2 answers
  • Which is the value of this expression when a= -2 and b= -3?
    7·1 answer
  • Question is the PNG file.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!