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DanielleElmas [232]
3 years ago
5

Which system of equations has exactly one solution?

Mathematics
2 answers:
Nastasia [14]3 years ago
7 0

Answer:

A.) 2 x minus 4 y = 8. x + y = 7.

Step-by-step explanation:

A.) 2 x minus 4 y = 8. x + y = 7.

2x-4y = 8

x+y=7

This has one solution

B.) 3 x + y = negative 1. 6 x + 2 y = negative 2.

3x+y = -1

Multiply by 2

6x +2y = -2

This is the second equation  so it has infinite solutions

C.) 3 x + 3 y = 3. Negative 6 x minus 6 y = 3.

3x+3y =3

Multiply by -2

-6x-6y = -6

The equation is the same but the constant, which means they are parallel lines, they have zero solutions

D.) 3 x minus 2 y = 4. Negative 3 x + 2 y = 4.

3x -2y = 4

Multiply by -1

-3x +2y = -4

The equation is the same but the constant, which means they are parallel lines, they have zero solutions

Ira Lisetskai [31]3 years ago
4 0

Answer:

A.) 2 x minus 4 y = 8. x + y = 7.

Step-by-step explanation:

A.) 2 x minus 4 y = 8. x + y = 7.

2x - 4y = 8

x - 2y = 4

x = 4 + 2y

x + y = 7

4 + 2y + y = 7

3y = 3

y = 1

x = 4 + 2

x = 6

Only solution: (6,1)

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What is 7m + 11 > -31
elena-14-01-66 [18.8K]

Answer:

I believe its m > -6

Step-by-step explanation:

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3 0
3 years ago
The circle below has a center D and its diameter is 10 feet. Given that m angle A D B equals 35 degree, find the length of major
goldfiish [28.3K]

The length of major arc ACB with angle measure of 325° and diameter of 10 feet is (325/36)π

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

angle of arc ACB = 360° - 35° = 325°

The length of major arc ACB = (325/360) * π * 10 = (325/36)π

The length of major arc ACB with angle measure of 325° and diameter of 10 feet is (325/36)π

Find out more on equation at: brainly.com/question/2972832

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8 0
2 years ago
Please solve 1,2,3,4,5,6,13,14,18 and 21
Volgvan
O.o that so hard but my big sister know how to do it
5 0
3 years ago
Read 2 more answers
Pls i need help ASAP best answer gets brainlest
Pani-rosa [81]

Answer:

3^12

Step-by-step explanation:

Simplify the expression, 3^10/3^-2.

Next, solve for the sum. which will be 3^12.

Full answer is 531441

3 0
3 years ago
Read 2 more answers
What is the solution for −40 = 10c? <br> A. c = 1 <br> B. C = -1 <br> C. c = -4 <br> D. c = 4
Aleks [24]

Answer:

C. c = -4

Step-by-step explanation:

you must get c by itself. you have to divide both sides by 10. this gets rid of the 10c and keeps both sides equal

-40/10 = c

c = -4

5 0
2 years ago
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