Question

Given two lines 𝐿1: 𝑥 + 4𝑦 = −10 and 𝐿2: 2𝑥 − 𝑦 = 7. i. Find the intersection point of 𝐿1 and 𝐿2.

68

likes
340 views

Answer to a math question Given two lines 𝐿1: 𝑥 + 4𝑦 = −10 and 𝐿2: 2𝑥 − 𝑦 = 7. i. Find the intersection point of 𝐿1 and 𝐿2.

Expert avatar
Gerhard
4.5
94 Answers
To find the intersection point of two lines, we need to solve the system of equations formed by the equations of the lines.

Given:
Line L1: x + 4y = -10
Line L2: 2x - y = 7

We can solve this system of equations by using any method like substitution, elimination, or matrices. Let's solve it using the substitution method.

Step 1: Solve one equation for one variable in terms of the other variable.
From the equation of L2, we can isolate y:
y = 2x - 7.

Step 2: Substitute the expression for the variable in the other equation.
Substitute y with (2x - 7) in the equation of L1:
x + 4(2x - 7) = -10.

Step 3: Simplify and solve for the remaining variable.
x + 8x - 28 = -10
9x - 28 = -10
9x = 18
x = 2.

Step 4: Substitute the value of x back into one of the original equations to find the value of y.
Using L2: 2(2) - y = 7
4 - y = 7
-y = 7 - 4
-y = 3
y = -3.

Therefore, the intersection point of L1 and L2 is (2, -3).

Answer: The intersection point of L1 and L2 is (2, -3).

Frequently asked questions (FAQs)
What is the resultant displacement when a vector of magnitude 3.5 m is added to a vector of magnitude 4.2 m at an angle of 60 degrees?
+
Math question: What is the maximum possible value of the function f(x)=-3x^2+6x+2 on the interval [0,5]?
+
Chain rule variant: Find the derivative of √(1 + x^2) with respect to (1 - x^2).
+
New questions in Mathematics
A circular park has a diameter of 150ft. A circular fence is to be placed on the edge of this park. Calculate the cost of fencing this park if the rate charged is $7 per foot. Use π = 3.14.
2x-y=5 x-y=4
X^2 = 25
By differentiating the function f(x)=(x³−6x)⁷ we will obtain
3x+5y=11 2x-3y=1
Perpetual annuities are a series of payments whose duration has no end. Explain how can we calculate them, if they have no end?
In a store, a person carries 14 kilos of rice and 28 kilos of flour. In what ratio are the kilos found? (Remember to simplify until you reach an irreducible fraction)
How many anagrams of the word SROMEC there that do not contain STROM, MOST, MOC or CEST as a subword? By subword is meant anything that is created by omitting some letters - for example, the word EMROSCT contains both MOC and MOST as subwords.
Solve the equation: sin(2x) = 0.35 Where 0° ≤ x ≤ 360°. Give your answers to 1 d.p.
A recurring sequence is one where elements repeat after completing one standard. If the sequence AB8C14D96AB8C1... is recurring its twentieth term is equal to: (A) B. (B) 8. (C) A. (D) 6. (E) D.
Convert 9/13 to a percent
Use a pattern to prove that (-2)-(-3)=1
Determine a general formula​ (or formulas) for the solution to the following equation.​ Then, determine the specific solutions​ (if any) on the interval [0,2π). cos30=0
How to convert 45 kg into grams
48 kg of 30% sulfuric acid in a mixture of 10% and 40% sulfuric acid arose. How many kilograms were each of the original solutions?
0<x<2π aralığındaki f(x)=x÷2 fonksiyonunun 0 < x < 4π için grafiğini çiziniz ve 0<x<2n için Fourier seri dönüşümünü gerçekleştiriniz.
To paint a 250 m wall, a number of workers were employed. If the wall were 30 m longer, 9 more workers would be needed. How many were employed at the beginning?
Determine the general solution of the equation y′+y=e−x .
3(x-4)=156
The car with an irresponsible driver starts to brake when it goes through a red light. When passing the traffic light, he does so at a speed of 115 kph in the right lane. Further ahead, 70 meters from the traffic light, a child is crossing the street and falls. If the effect of the car's brakes is equivalent to a deceleration of magnitude 5.7m/s². Is the child hit by the car or not? How far from the traffic light does the car stop?