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REY [17]
3 years ago
9

3x + 5y = 78

Mathematics
2 answers:
fenix001 [56]3 years ago
8 0

Answer:  The correct option is (B) 6.

Step-by-step explanation:  We are given to select the x co-ordinate of the point of intersection of the following lines.

3x+5y=78~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)\\\\2x-y=0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(ii)

To find the x co-ordinate of the point of intersection, we need to solve the given system of equation to find the point of intersection.

From equation (ii), we have

2x=y\\\\\Rightarrow y=2x~~~~~~~~~~~~~~~~~~~~~~~~(iii)

Substituting the value of y from equation (iii) in equation (i), we get

3x+5(2x)=78\\\\\Rightarrow 3x+10x=78\\\\\Rightarrow 13x=78\\\\\Rightarrow x=\dfrac{78}{13}\\\\\Rightarrow x=6.

Thus, the x co-ordinate of the point of intersection of the given lines is 6.

Option (B) is CORRECT.

zysi [14]3 years ago
5 0
Hello here is a solution :
<span>3x + 5y = 78 .... (1)
2x - y = 0 ... (2)
from (2) : y = 2x
in (1) : 3x+5(2x) =78
            13x = 78
x= 6
 but : y =2x    y=2(6) = 12
answer : x=6</span>
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The second choice is the answer.

Step-by-step explanation:

In math, there are two types of numbers: real numbers and imaginary numbers. Imaginary numbers build upon the premise that the equation

x^2 +1 = 0 has no real solution. It is said that one of the imaginary solutions to this equation is <em>i</em>, or √-1. Real numbers are numbers that can represent the "distance" of a line. Real numbers have subsets known as natural numbers, whole numbers, integers, natural numbers. It also has a region of irrational numbers.

Natural numbers are numbers you use to count w/ your fingers (1, 2, 3 ...)

Whole numbers are natural numbers and 0 (0, 1, 2, 3 ...)

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The answer is not the first choice because it has whole numbers.

The answer is not the third choice because it has integers.

The answer is not the fourth choice because it has irrational numbers.

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Anyone help with this please? I need a, b and c
skad [1K]
I hope this helps you

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