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Mademuasel [1]
3 years ago
11

While walking home on a dark night, Joanna saw a bright light in the sky and concluded that it must have been a spaceship from a

nother planet. Which of these questions could Joanna answer using scientific methods of investigation?
A) Can aliens read our minds?
B) Does Joanna actually believe in aliens?
C) What is the aliens spacecraft made from?
D) What percent of people in the area saw a bright light that night?
Mathematics
2 answers:
ikadub [295]3 years ago
6 0
C i believe. hope this helps :)
vekshin13 years ago
4 0
D makes sense because it's the only option that is using a legitimate form of data collection.
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Step-by-step explanation:

The dividend is the number which is being divided and the divisor is what you divided by. An example is:

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X - 6 <br> ———- = 5<br> 3<br><br> A.) x = 9<br> B.) x = 14<br> C.) x = 21<br> D.) x = 24
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Which formula has a square root?
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Step-by-step explanation:

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3 years ago
Is (1, 4) a solution to this system of equations? 8x + 3y = 20 x + 4y = 17
vampirchik [111]

Answer:

Yes.

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>

<u>Algebra I</u>

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Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

8x + 3y = 20

x + 4y = 17

(1, 4)

<u>Step 2: Check</u>

<em>Plug and verify the coordinates is a solution.</em>

  1. Substitute in point [1st Equation]:                                                                    8(1) + 3(4) = 20
  2. Multiply:                                                                                                             8 + 12 = 20
  3. Add:                                                                                                                   20 = 20 \checkmark
  4. Substitute in point [2nd Equation]:                                                                  1 + 4(4) = 17
  5. Multiply:                                                                                                             1 + 16 = 17
  6. Add:                                                                                                                   17 = 17 \checkmark

∴ Since both equations work out, (1, 4) is a solution to the systems of equations.

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Jacob walked three and two-eighths of a mile and Benjamin walked two and five-eighths of a mile. How much further did Jacob walk
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