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larisa86 [58]
3 years ago
13

4x^2-20=5 solve by using the square root property

Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
7 0

Step-by-step explanation:

4x^2 - 20 = 5

4x^2 -25 = 0

4x^2 = 25

2x = 5, or -5

x = 5/2 , or -5/2

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Ect the best answer for the question.
steposvetlana [31]

Answer:

y = -11/12x + 4

Step-by-step explanation:

(-12,15) and (0.4)

4 - 15 = -11

0 -(-12) = 12 (since minus a negative = positive)

-11/12

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15 = -11/12(-12)

15 = 11 + b

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Additional Information:

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Select the expression that is equivalent to 48 + 12.
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ValentinkaMS [17]

Answer:

∆BDC ~ ∆EDA

Step-by-step explanation:

From the given figure in the diagram contained in the question:

=>Angle EDA is congruent to angle BDC

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3 years ago
BC= <br> round to the nearest hundredth
ivolga24 [154]

Answer:

AC ≈ 5.87

General Formulas and Concepts:

<u>Math</u>

  • Rounding

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
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<u>Trigonometry</u>

[Right Triangles Only] SOHCAHTOA

[Right Triangles Only] tanθ = opposite over adjacent<u> </u>

Step-by-step explanation:

<u>Step 1: Identify</u>

Angle θ = 50°

Opposite Leg = 7

Adjacent Leg = BC

<u>Step 2: Solve for BC</u>

  1. Substitute in variables [tangent]:                                                                     tan50° = 7/AC
  2. [Multiplication Property of Equality] Multiply AC on both sides:                   ACtan50° = 7
  3. [Division Property of Equality] Isolate AC:                                                      AC = 7/tan50°
  4. Evaluate:                                                                                                           AC = 5.8737
  5. Round:                                                                                                               AC ≈ 5.87
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3 years ago
Which of the following numbers is rational?
anygoal [31]

Answer:

4/5

Step-by-step explanation:

It's rational because it terminates

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