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
Taya2010 [7]
2 years ago
5

A) Solve by determinant method: x - y = 2, 2x + 3y = 4​

Mathematics
1 answer:
grin007 [14]2 years ago
4 0

Answer:

x = 2

y = 0

Step-by-step explanation:

x - y = 2

2x + 3y = 4

Using creamers rule of determinants, we have;

D =

|1 1|

|2 3|

Thus; D = (1 × 3) - (1 × 2)

D = 1

Dx =

|2 1|

|4 3|

Dx = (2 × 3) - (1 × 4)

Dx = 2

Dy =

|1 2|

|2 4|

Dy = (1 × 4) - (2 × 2)

Dy = 0

Thus;

x = Dx/D = 2/1

x = 2

y = Dy/D = 0/1

y = 0

You might be interested in
Can anyone tell me if this is right
Rashid [163]

Answer:

yes it is correct

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
1.On Sunday morning, Mrs. Turner made 2 gallons of juice. How many cups of juice did she make?2. Later that night, her family dr
kap26 [50]

Answer:

1. 16 cups

2. 8 pints

Step-by-step explanation:

In this question, we are asked to calculate the amount of cups of juice made from a certain gallon and the amount left in pints after some certain amount of the juice was consumed.

To solve this problem, we need to know the amount of cups present in a gallon of juice.

Mathematically, there are 16 cups present in a gallon. Now since she made two gallons, the amount of cups present is thus 16 * 2 = 32 cups of juice

2. 16 cups was consumed by the family. The amount of cups left is thus 32 - 16 = 16 cups of juice

We need our answer in pints however.

Mathematically, 1 pint is composed of 2 cups.

This means 16 cups would be composed of 16/2 pints = 8 pints

4 0
3 years ago
Read 2 more answers
15. Find the force on an electron crossing a uniform magnetic field of intensity 0.5 T WILII
EleoNora [17]

Answer:

F = 8.48 x 10^{-18} N

Step-by-step explanation:

The force on an electron in a magnetic field can be determined by;

F = qvB Sin θ

where: e is the electron, v is its velocity, B is the measure of the magnetic field, and θ is the angle of its path.

Thus,

q = -1.6 x 10^{-19} C

v = 106 m/s

B = 0.5 T

θ = 90^{o}

So that,

F = 1.6 x 10^{-19} x 106 x 0.5

  = 8.48 x 10^{-18} N

The force on the electron crossing the uniform magnetic field is 8.48 x 10^{-18} N.

8 0
3 years ago
9. The scale on a map is 1 cm : 7 km. If two cities are 15 cm apart on the map, what is the actual distance between the cities?
Vesna [10]

Answer:

105

Step-by-step explanation:

One way to get this is by multiplying 15 by seven because the key says that one cm equals 7 km

4 0
3 years ago
Find the possible value or values of n in the quadratic equation 2n2 – 7n + 6 = 0.
nika2105 [10]
2n^2 - 7n + 6 = 0\\
2n^2-4n-3n+6=0\\
2n(n-2)-3(n-2)=0\\
(2n-3)(n-2)=0\\
n=\dfrac{3}{2} \vee n=2

8 0
3 years ago
Other questions:
  • I need to know how to solve for x in the triangle?
    14·1 answer
  • Can somebody help me with these?
    8·2 answers
  • Can someone pls help me :)
    15·1 answer
  • Find the values of x and y.<img src="https://tex.z-dn.net/?f=x%20%3D%2034%5Csqrt3%20y%20%3D%2017%5C%5Cx%20%3D%20y%20%3D%2034%2C%
    9·1 answer
  • At a local clothing store, the price of an $80 winter coat was reduced by 25% when spring arrived. Once it was summer time, the
    14·1 answer
  • -7 2/3+(-5 1/2)+ 8 3/4
    7·1 answer
  • D =
    11·1 answer
  • If x ≠ 2y, then <br><br> eq1a<br><br><br> 2(x-2y)<br><br> 2y-x<br><br> 1<br><br> 0<br><br> -2
    9·1 answer
  • Help me on my question please <br><br> Giving Brainlist
    11·2 answers
  • Find the measure of angle b
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!