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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.

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AVprozaik [17]

Answer:

B

Step-by-step explanation:

The volume (V) of a rectangular prism is calculated as

V = length × width × height

Calculate the volume of each prism

Q → V = 8 × 4 × 5 = 60 ft³

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5 0
3 years ago
find the area of a circke with a radius of 9 mm. round to the nearest tenth. use 3.15 or 22/7 for Pi.​
GREYUIT [131]

Answer:

254.3 mm^2

Step-by-step explanation:

Area of a circle: A = π*r^2

π (pi) = 3.14

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Substitute 3.14 for pi and 9 for radius:

A = π*r^2

A = 3.14*9^2

A = 3.14*81

A = 254.34 mm^2

Round to the nearest tenth:

254.34 ==> 254.3

Therefore, our final answer is 254.3 mm^2

Hope this helps!

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2 years ago
Plsss answer, don’t need too show any work
Dovator [93]
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Step-by-step explanation:

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