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Brut [27]
3 years ago
5

Which of the following equations have infinitely many solutions? Choose all answers that apply: Choose all answers that apply: (

Choice A) A x-37=x-37x−37=x−37x, minus, 37, equals, x, minus, 37 (Choice B) B 73x-37=73x-3773x−37=73x−3773, x, minus, 37, equals, 73, x, minus, 37 (Choice C) C 37x-37=37x-3737x−37=37x−3737, x, minus, 37, equals, 37, x, minus, 37 (Choice D) D 74x-37=74x-3774x−37=74x−37
Mathematics
2 answers:
TiliK225 [7]3 years ago
5 0

Answer:

All options are correct.

Step-by-step explanation:

In option (A), the given equation is

x-37=x-37

Add 37 on both sides.

x-37+37=x-37+37

x=x

Subtract x from both sides.

x-x=x-x

0=0

LHS=RHS for all values of x. It means equation x-37=x-37 has infinite many solutions.

Similarly.

In option (B), the given equation is

73x-37=73x-37

73x=73x

0=0

LHS=RHS for all values of x. It means equation 73x-37=73x-37 has infinite many solutions.

In option (C), the given equation is

37x-37=37x-37

37x=37x

0=0

LHS=RHS for all values of x. It means equation 37x-37=37x-37 has infinite many solutions.

In option (D), the given equation is

74x-37=74x-37

74x=74x

0=0

LHS=RHS for all values of x. It means equation 74x-37=74x-37 has infinite many solutions.

Therefore, all options are correct.

prisoha [69]3 years ago
5 0

Answer:−6x+35=−6x+35

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An airplane travels 6111 kilometers against the wind in 9 hours and 7911 kilometers with the wind in the same amount of time. Wh
natima [27]

Answer:

Speed of the plane in still air: 779\; {\rm km \cdot h^{-1}}.

Windspeed: 100\; {\rm km \cdot h^{-1}}.

Step-by-step explanation:

Assume that x\; {\rm km \cdot h^{-1}} is the speed of the plane in still air, and that y\; {\rm km \cdot h^{-1}} is the speed of the wind.

  • When the plane is travelling against wind, the ground speed of this plane (speed of the plane relative to the ground) would be (x - y)\; {\rm km \cdot h^{-1}}.
  • When this plane is travelling in the same direction as the wind, the ground speed of this plane would be (x + y)\; {\rm km \cdot h^{-1}}.

The question states that when going against the wind (v = (x - y)\; {\rm km \cdot h^{-1}},) the plane travels 6111\; {\rm km} in 9\; {\rm h}. Hence, 9\, (x - y) = 6111.

Similarly, since the plane travels 7911\; {\rm km} in 9\; {\rm h} when travelling in the same direction as the wind (v = (x + y)\; {\rm km \cdot h^{-1}},) 9\, (x + y) = 7911.

Add the two equations to eliminate y. Subtract the second equation from the first to eliminate x. Solve this system of equations for x and y: x = 779 and y = 100.

Hence, the speed of this plane in still air would be 779\; {\rm km \cdot h^{-1}}, whereas the speed of the wind would be 100\; {\rm km \cdot h^{-1}}.

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Step-by-step explanation:

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Answer:

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Find f(x) + g(x) for<br> [ f(x) = 6x – 4<br> [g(x) = -5x + 24
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Answer:

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General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

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  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
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<u>Algebra I</u>

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Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = 6x - 4

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<u>Step 2: Find f(x) + g(x)</u>

  1. Substitute in functions:                                                                                     f(x) + g(x) = 6x - 4 + (-5x + 24)
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  3. Combine like terms:                                                                                         f(x) + g(x) = x + 20
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