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
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>
You might be interested in
Question 3(Multiple Choice Worth 3 points)
KiRa [710]

Answer:

-5

Step-by-step explanation:

The coefficient is the number that goes in front of the variable

The only variable is x and the number in front is -5

The coefficient is -5

5 0
3 years ago
Help me please I have no idea what to do
Trava [24]

Answer:

hamood

Step-by-step explanation:

4 0
3 years ago
Plz give explanation.<br> solve | k-10 | = 3
Ne4ueva [31]

Answer:

13

Step-by-step explanation:

Explanation:

Use the absolute value definition to rewrite the absolute value equation as two separate equations.

k-10=3

k-10=-3

Solve the equation for k

k=13

k-10=-3

k=13

k=7

The equation has 2 solutions, meaning k1=7,k2=13. Which gives you the answer of: 13 (K1=7,k2=13)

6 0
2 years ago
Help!!!!!!!!!!!!!!!!!<br> Plz help me :)
user100 [1]

Answer:

a) 121,000

b)8.35 x 10^-6

Step-by-step explanation:

7 0
2 years ago
Coach McGee uses the table to show her team’s current basketball shot average compared to previous years.
Yuri [45]

Answer:

Its B.

Step-by-step explanation:

It said so.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Nancy is planning a birthday party for her coworker, Sarah. She realizes that there are 10 medical assistants and 8 nurse assist
    7·1 answer
  • Can someone please help
    11·1 answer
  • What is the factorization of the trinomial below? 14x^2-39x-35
    13·1 answer
  • A bag of marbles weight 15 pounds. What would 2.25 bags weight?
    12·1 answer
  • Math question down below
    7·1 answer
  • Which of the following could be true if y ≤ -75?
    15·1 answer
  • (x-2)+(x+6)<br> Please explain
    9·1 answer
  • 39) Solve the inequality: 4(x+5)≤116<br> A. x≤−51<br> B. x≤−40<br> C. x≤24<br> D. x≥24
    11·1 answer
  • NEED HELPPPP! This is hard for me to do!
    8·1 answer
  • What is the volume of a right rectangular prism with a length of 4.8 meters, a width of 2.3 meters, and a height of 0.9 meters?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!