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
Anestetic [448]
3 years ago
8

Which of the following equations have exactly one solution?

Mathematics
2 answers:
Maurinko [17]3 years ago
5 0

Answer: 19x + 18 = 19x + 18

19x - 18 = -19x + 18

Step-by-step explanation:

djverab [1.8K]3 years ago
4 0

Answer:

Options C and D.

Step-by-step explanation:

Choice (A).

-19x - 18 = -19x + 18

Here we are equating two equations,

y = -19x - 18

y = -19x + 18

Since slopes of these equations are same as (-19), both are parallel.

Therefore, there is no solution for the given system of equations.

Choice (B)

-19x + 18 = -19x + 18

Equations are,

y = -19x + 18

y = -19x + 18

Since both the equations represent the same line, so the system of equations will have infinite solutions.

Choice (C)

19x - 18 = -19x + 18

System of equations is,

y = 19x - 18

y = -19x + 18

Slopes of both the lines are different (19 and -19)

Therefore, the system of equations will have exactly one solution.

Choice (D)

19x + 18 = -19x + 18

System of equations is,

y = 19x + 18

y = -19x + 18

This system of equations have the different slopes.

Therefore, the system of equations will have exactly one solution.

You might be interested in
the spinner is divided in to 8 equal sections. if the arrow lands on a number, what is the probability that it will land on a 1
Tcecarenko [31]

25% there are 8 sections and there are two you are trying to land on making it 2/8=25%

3 0
3 years ago
A retailer returned 2700 defective items to the manufacturer and received a credit for the retail price of $0.83 or 834/34 per i
Helga [31]

Answer:

credit gain by retailer is $2257.39

Step-by-step explanation:

Given data:

Retaile price 83 4/3 c or 84.33c

Let Discount rate 6/7

Discount amount = (6/7)% of 84.33 c = 0.7228 C

Net credit received = 84.33c - 0.7228c = 83.607c

Net credit received = 83.607 c

Item required  = 2700

Total discount = 2700 × 83.0607 = 225739.44c

Total discount = $2257.39

credit received by retailer is $2257.39

8 0
4 years ago
100 students are interviewed to see which of biology, chemistry or physics they prefer.
Anna11 [10]

Answer: 41%

Step-by-step explanation:

15 girls prefer biology.

Find the boys who prefer biology;

There are 36 girls in total so;

= 100 - 36

= 64 boys interviewed

14 boys prefer Physics

= 64 - 14

= 50 boys prefer Biology and Chemistry

7 out of the 31 who prefer chemistry are girls so the boys who prefer chemistry are;

= 31 - 7

= 24 boys

Boys who prefer Biology;

= 50 - 24

= 26 boys

Total who prefer biology;

= 15 girls + 26 boys

= 41 students

Percentage = 41/100 = 41%

8 0
3 years ago
A rectangle has a height to width ratio of 3:4.5. Give two examples of dimensions for rectangles that could be scaled versions o
OlgaM077 [116]

We have been given that a rectangle has a height to width ratio of 3:4.5.

Let h be height and w be width of rectangle.

We can set our given information in an equation as:

\frac{h}{w} =\frac{3}{4.5}

h=\frac{3}{4.5} *w

Now we will substitute h=1 in this equation.

1=\frac{3}{4.5} *w

3w=4.5

w=\frac{4.5}{3} =1.5

We can see that width of rectangle is 1.5 times height of rectangle.

Our one set of dimensions of rectangle will be: height=1 and width=1.5.

We can get many set of dimensions for our rectangle by multiplying both height and width of rectangle by same number.

Multiplying by 5 we will get our dimensions as: height 5 and width 7.5.  

Therefore, (1 and 1.5) and (5 and 7.5) dimensions for rectangle will be scaled version of our rectangle.

6 0
3 years ago
14) 25 , 13, 4, 20,16,3,2,5<br>​
Igoryamba

Answer:

2,3,4,5,13,20,25 or

2,4,16,20(even number)

3,5,13,25 (odd number)

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • For an arts and crafts project, a student cut a triangle out of a rectangular piece of paper. If the triangle has a base of 6 in
    7·1 answer
  • Last Saturday, Kevin walked his dog 1 2/7 miles. Sam walked his dog 7 times as far. How many miles total did both guys walk thei
    10·1 answer
  • When conducting a paired differences test, what is the value of n? The total number of data values. The total number of data val
    12·1 answer
  • Given the function f(x)=√5x, which transformation results in the horizontal stretching and reflecting across the y-axis?
    9·1 answer
  • 35% of the spectators at a baseball match are New York Yankees fan and the rest are Boston Red Sox fan. 30% of the fans in both
    8·1 answer
  • 8. mABC<br> (20x - 15)<br> Β Α<br> Answer:
    5·1 answer
  • Cameras R Us has a sale for 25% off camera bags, which is a discount of $20. To find the original cost of the camera bag, Tara c
    8·2 answers
  • Solve for X <br><br> Will give brainiest
    11·2 answers
  • It costs $7.15 to rent a kayak for 1 hour at a local state park. The price per hour stays the same for up to 5 hours of rental.
    12·2 answers
  • According to the information given, what can you determine about the triangles formed by Tyler, the mirror, and the peak? How do
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!