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Elden [556K]
3 years ago
5

True or false? When n is a negative integer, n-n=0. Justify your response

Mathematics
1 answer:
gulaghasi [49]3 years ago
7 0
This would be true. It is a trick question if you didn't pay attention to the negative. Just try substituting the n s for negative integers. For example:
-4--4. The negatives rule each other out and then -4+4=0.
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Brody deposited $500 into an account that earns 4.2% interest compounded annually. He makes no additional deposits and no withdr
Flauer [41]
The total interest will be $167

5 0
3 years ago
Using the quadratic formula to solve 4x^2-3x + 9=2x + 1 what are the values of x​
Alchen [17]

Answer:

x=5±√−103/8

Step-by-step explanation:

There's no real solutions

4x2−3x+9−(2x+1)=2x+1−(2x+1)

4x2−5x+8=0

x=−b±√b2−4ac/2a

x=−(−5)±√(−5)2−4(4)(8)/2(4)

x=5±√−103/8

8 0
3 years ago
Find x in the figure.<br><br><br> A) x = 44<br><br> B) x = 16<br><br> C) x = 22<br><br> D) x = 66
MakcuM [25]

Answer:

<h2>C)  x = 22</h2><h2 />

Step-by-step explanation:

3x + 3x + 48 = 180

6x = 180 - 48

x = 132 / 6

x = 22

7 0
3 years ago
Read 2 more answers
If h(x) = (f o g)(x) and h(x) = ∛7x+1, find f(x) and g(x)
Mariana [72]
There's more than one way to combine them really
but an obvious one will be

\bf \begin{array}{llll}&#10;h(x)&=&(f\circ g)(x)\\\\&#10;&&\sqrt[3]{7x+1}\\\\&#10;&&\sqrt[3]{g(x)}\leftarrow &#10;\begin{array}{llll}&#10;f(x)=\sqrt[3]{x }\\\\&#10;g(x)=7x+1&#10;\end{array}&#10;\end{array}\\\\&#10;-----------------------------\\\\&#10;(f\circ g)(x)\iff f[\quad g(x)\quad ]=\sqrt[3]{g(x)}\implies  f[\quad g(x)\quad ]=\sqrt[3]{7x+1}
7 0
3 years ago
PQR is a right angled triangle calculate the size of angle marked x
romanna [79]

Answer:

\displaystyle x \approx 37.4^\circ

General Formulas and Concepts:

<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<u> </u>

Equality Properties

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

<u>Trigonometry</u>

  • [Right Triangles Only] SOHCAHTOA
  • [Right Triangles Only] cosθ = adjacent over hypotenuse<u> </u>

Step-by-step explanation:

<u>Step 1: Define</u>

Angle θ = <em>x</em>

Adjacent Leg = 5.8

Hypotenuse = 7.3

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Substitute in variables [Cosine]:                                                                    \displaystyle cosx^\circ = \frac{5.8}{7.3}
  2. [Fraction] Divide:                                                                                             \displaystyle cosx^\circ = 0.794521
  3. [Equality Property] Trig inverse:                                                                    \displaystyle x^\circ = cos^{-1}(0.794521)
  4. Evaluate trig inverse:                                                                                      \displaystyle x = 37.39^\circ
  5. Round:                                                                                                             \displaystyle x \approx 37.4^\circ
8 0
3 years ago
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