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
Art [367]
3 years ago
15

X + 2y = 5

Mathematics
2 answers:
Inessa05 [86]3 years ago
8 0

Answer:  The correct option is (C) 2.

Step-by-step explanation:  We are given to find the value of the y-determinant for the following system of linear equations :

x+2y=5~~~~~~~~~~~~~~~~~~~~~~(i)\\\\x-3y=7~~~~~~~~~~~~~~~~~~~~~~(ii)

The y-determinant for the above system is written as

D(y)=\begin{vmatrix}1 & 5\\ 1 & 7\end{vmatrix}

The value of the y-determinant will be

D(y)=\begin{vmatrix}1 & 5\\ 1 & 7\end{vmatrix}=1\times7-1\times5=7-5=2..

Thus, the required value of the y-determinant is 2.

Option (C) is CORRECT.

Dafna11 [192]3 years ago
3 0
B. 2
if any other number was in there i dont think it would work because its neg
You might be interested in
What is factor ? someone explain pls !!
Lubov Fominskaja [6]

Step-by-step explanation:

Factor, in mathmatechis, a number or algebric expression that divides another number or expression evenly.

For example, 3 and 6 are factors of 12 because 12 divided by 3 equals 4 exactly and 12 divided by 6 equals 2 exactly. The other factors of 12 are 1, 2, 4, and 12.

3 0
2 years ago
Read 2 more answers
How do I study for a big math test? any tips on how to study I'm a visual learner.
Nastasia [14]

Honestly? Just review your notes and try to work out the problems yourself before taking a look at the answer. You can also google specific topics that the test will cover and try the practice problems.

3 0
3 years ago
Read 2 more answers
Answer I will mark your brainlist
yan [13]

Answer:

Mark C.

Step-by-step explanation:

If there are 27 students in both classes, it's logicial to multiply both classes by two to get the total students.

Since the <em>S</em> stands for the students absent, that should come after the brackets.

3 0
2 years ago
What is the value of k if the line 5x+ky=12 passes through the point (2,-1).
olchik [2.2K]

Answer:

k = -2

Step-by-step explanation:

1. Substitute the point (2,-1) into the given equation 5x+ky=12. The first number is 2, the x-value. The second number is -1, the y-value.

5x + ky = 12

5(2) + k(-1) = 12

2. Simplify

5(2) + k(-1) = 12

10 + (-k) = 12

10 - k = 12

2. Isolate k

10 - k = 12

-k = 12-10

-k = 2   <= here multiply both sides by (-1)

k = -2

5 0
3 years ago
Use the substitution method to solve the system of equations. Choose the
sertanlavr [38]
The answer is C because if you substitute in X-6 for the y in the first equation (since X-6 is also equal to y), you get 2x=16 which means x=8. There is only one option where 8 is equal to X, but just to check you can substitute it back into either of the original equations to make sure that y=2.
4 0
3 years ago
Other questions:
  • A yogurt costs 35 pence. How many yogurts can be bought with 3 pounds?
    7·1 answer
  • What is an undefined slope
    8·2 answers
  • The total area of two square windows is 1025 in2. Each side of the larger window is 5 in longer than the sides of the smaller wi
    10·2 answers
  • What is the square root of 72 simplified
    10·2 answers
  • A scientist listed the volumes, in milliliters, of some liquids used in an experiment.
    14·2 answers
  • Help me!!<br> solve for d
    9·1 answer
  • A plumber charges $30.00 per call plus $25.00 per hour. If a certain repair cost $80.00, how long does it take?
    9·1 answer
  • A storage tank has a radius of x + 5 metres and a height of x metres. Determine the dimensions of the tank if the volume is 192π
    15·1 answer
  • | result | blue | red | yellow | orange |
    11·1 answer
  • The graph shows the motion of two cars starting at different places on a highway. Their speeds can be compared by comparing the
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!