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4vir4ik [10]
3 years ago
13

Number 27.

Mathematics
1 answer:
atroni [7]3 years ago
5 0
<h3>Answer:</h3>

none of these has "no solution"

<h3>Explanation:</h3>

A. The solution is (8/3, 3)

B. The second equation is -1/2 times the first, so these describe the same line. The system has an <em>infinite number of solutions</em>.

C. The solution is (-4, -2)

D. The solution is (4, -2)

E. The second equation is 2 times the first, so these describe the same line. The system has an <em>infinite number of solutions</em>.

_____

A system of equations will have "no solution" when it describes parallel lines—lines that do not intersect. In standard form, such equations are recognizable by their different constants. For example,

  • 3x -4y = -4
  • 3x -4y = 20 . . . . . . 20 is different from -4

have different constants, so the equations describe parallel lines.

We could multiply one of these by -2 and the system would still be "inconsistent"—having no solution.

  • 3x -4y = -4
  • -6x +8y = -40
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bearhunter [10]

Answer:

Well if you need help with graphing, there's a website named Desmos Graphing calculator. If you want to get your grades up, listen to some music then do the easy stuff. I dont know any websites from the top of my head :p

Step-by-step explanation:

6 0
3 years ago
Simplify <br><img src="https://tex.z-dn.net/?f=%20%20%5Csqrt%7B%20-%20180%7D%20" id="TexFormula1" title=" \sqrt{ - 180} " alt="
QveST [7]

Answer: (6\sqrt{5})i

This is the same as saying 6i\sqrt{5}

====================================================

Work Shown:

\sqrt{-180} = \sqrt{-1*36*5}\\\\\sqrt{-180} = \sqrt{-1}*\sqrt{36}*\sqrt{5}\\\\\sqrt{-180} = i*6*\sqrt{5}\\\\\sqrt{-180} = 6i\sqrt{5}\\\\\sqrt{-180} = (6\sqrt{5})i\\\\

where i = \sqrt{-1}

As the steps show above, the idea is to factor the radicand into smaller pieces where one of those pieces is the largest perfect square possible. In this case, 36 is the largest factor of 180 that's a perfect square. Then I used the rule \sqrt{A*B} = \sqrt{A}*\sqrt{B} to break up the root.

The parenthesis used at the very end is to help separate the 6\sqrt{5} from the i term. The "i" is not under the square root.

4 0
3 years ago
Calculate the volume of each pyramid to determine
kipiarov [429]

Answer:

1: 120

2: 138

3: Less than

Step-by-step explanation:

7 0
3 years ago
Tia's parents gave her $20 to spend at the spring carnival. she spends $5 on funnel cake and the rest on ride tickets. if each r
lukranit [14]

Answer:

okay so do 20-5=15 then divide how much each ticket costs and you get the answer.

3 0
3 years ago
BRAINLIEST AND 50 POINTS!!!!!!!!!!!!!!!!!!
alexira [117]

Answer:

  • 32.6 cm³

Step-by-step explanation:

The volume formula

  • V = Bh

Given

  • B = 8.15 cm² and h = 4 cm

Find the volume by substituting the values into formula

  • V = 8.15*4 = 32.6 cm³
8 0
2 years ago
Read 2 more answers
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