Question

Given two lines ๐ฟ1: ๐‘ฅ + 4๐‘ฆ = โˆ’10 and ๐ฟ2: 2๐‘ฅ โˆ’ ๐‘ฆ = 7. i. Find the intersection point of ๐ฟ1 and ๐ฟ2.

68

likes
340 views

Answer to a math question Given two lines ๐ฟ1: ๐‘ฅ + 4๐‘ฆ = โˆ’10 and ๐ฟ2: 2๐‘ฅ โˆ’ ๐‘ฆ = 7. i. Find the intersection point of ๐ฟ1 and ๐ฟ2.

Expert avatar
Gerhard
4.5
90 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 volume of a rectangular solid with length, width, and height given by L = 4m, W = 6m, and H = 3m?
+
Question: What is the measure, in degrees, of an interior angle of a regular hexagon?
+
What is the resulting vector when the scalar multiplication of vector ๐ฎ = โŸจ3, -2โŸฉ and scalar ๐‘˜ = 4 is performed?
+
New questions in Mathematics
11(4x-9)= -319
5/8 x 64
What is the amount of interest of 75,000 at 3.45% per year, at the end of 12 years and 6 months?
Use the elimination to find the solution to each linear system. X+y=43 2x-y=20
a bank finds that the balances in its savings accounts are normally distributed with a mean of $500 and a standard deviation off of $40. What is the probability that a randomly selected account has a balance of more than $400?
4.2x10^_6 convert to standard notation
4x567
Suppose 56% of politicians are lawyers if a random sample of size 873 is selected, what is the probability that the proportion of politicians who are lawyers will be less than 55% round your answer to four decimal places
how many arrangements can be made of 4 letters chosen from the letters of the world ABSOLUTE in which the S and U appear together
Use the power rule for logarithms to solve the following word problem exactly. If you invest $1, 000 at 5% interest compounded annually, how many years will it take before you have $2,000?
A machine produces 255 bolts in 24 minutes. At the same rate, how many bolts would be produced in 40 minutes?
-1%2F2x-4%3D18
Show work on 4108 divided by 4
Determine a general formulaโ€‹ (or formulas) for the solution to the following equation.โ€‹ Then, determine the specific solutionsโ€‹ (if any) on the interval [0,2ฯ€). cos30=0
-5x=115
Consider mixing 150 ml, 0.1M, HCI with 100 ml, 0.2M, KOH solution. Determine the pH of final solution.
The blood types of individuals in society are as follows: A: 30%, B: 25%, AB: 20%, 0: 25%. It is known that the rates of contracting a certain disease according to blood groups are as follows: A: 7%, B: 6%, AB: 7%, 0: 4%. Accordingly, if a person selected by chance is known to have this disease, what is the probability of having blood group O?
The slope of the tangent line to the curve f(x)=4tan x at the point (ฯ€/4,4)
calculate the product of 4 and 1/8
A gas is leaking at 3.5ft3/min in a room of 2.9m by 6.9ft by 15.7m. How long would it take (in seconds) for 22% of the room to reach the LFL, if the gas has a LFL of 2.51%?