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natita [175]
3 years ago
6

How do I solve this equation

Mathematics
1 answer:
arlik [135]3 years ago
7 0

 
 
REVIEW OF BASIC MATHEMATICAL RULES
 
   Rules for Signed Numbers     Addition Rules:   positive + positive =  (add) positive  Ex:  2 + 1 =  3
  negative + negative =  (add) negative  Ex:  –3+ (–5) = –8
  negative + positive =  (subtract) and   Ex:  2 + (–10)  = –8      take sign of number with largest   Ex:  –14 + 16 =  2      absolute value
 
-------------------------------------------------------------------------------------------------------------------   Remember:  –(–7) means take the opposite of (–7)  =  7  ----------------------------------------------------------------------------------------------------------------- Subtraction Rules:  Change all “subtraction” to addition and take the opposite sign of the following number then follow the addition rules.
 
  Ex:   –7 – (9)  means    Ex:  –3 – (–10)  means            –7 + (–9)  =  -16           –3 + (10)  =  7
 
  Ex:   –8 + (–9) – (–1) – 2       -change all subtraction signs as indicated above
          –8 + (–9) + (1) + (–2)     -do addition and subtraction from left to right
   –17    +   (1) + (–2)
          –16        +  (–2)  = –18
 
 Multiplication/Division Rules:  The rules for multiplication and division are the same.    positive  ( or )  positive  =  positive Ex:  10  2 = 5   negative  ( or )  negative  =  positive Ex:  –4  (–3) = 12   negative  ( or )  positive  =  negative Ex:  18 (–2)  –9   
Tutoring and Testing Center 
 Order of Operations:   Parenthesis; Exponents; Multiplication or Division from left to right;   Addition or Subtraction from left to right
 
  P.E.M.D.A.S.
 
 
  Ex:       -7 + 20 ÷ (-4)(5)- 32 - (-8) + 4(3 – 7)           1. Parenthesis    -7 + 20 ÷ (-4)(5) - 32- (-8) + 4(-4)  2. Exponents    -7 + 20 ÷ (-4)(5) - 9  - (-8) + 4   3. Division    -7 +     (-5)    (5) - 9  - (-8) + 4  4. Multiplication    -7 +        (-25)     - 9  - (-8) + 4  5. Addition              -32            - 9  - (-8) + 4  6. Change subtraction signs              -32      +   (-9)  + (8) + 4                       -41          +   8  + 4                       -33        + 4  = -29
 
---------------------------------------------------------------------------------------------------------------------      Percent Equation: 
 
  What percent of  the total is the part?       %            T       =     P
 
 
12% of the 200 students enrolled in freshman English earned a grade of “A” in the class.  How many students earned an “A”?                                               Ex:  12%  of  200  is  what         - Translate into an equation             (“of” means “multiply”; “is” means “equal”)    0.12   x   20   =   x  - Change % to a decimal                                           24  =  x
 
 
 
 
 
 Percent Decrease/Increase:    Last year student employment jobs paid $7.25 per hour.  This year student employment jobs are paying $8.45 per hour.  What percent increase was given to student employment jobs?
 
      1. Find the amount of the increase:  $8.45 - $7.25 = $1.20
 
      2. Which (hourly pay) total received an increase?  The $7.25 per hour got increased.
 
      3. What % of the total was the increase?      x  7.25 = 1.20        7.25x    = 1.20
      
25.7 20.1
25.7 25.7  x      x  = .1655      x  = 16.6% increase --------------------------------------------------------------------------------------------------------------------    Place Value:     101 = 10  10–1 = 0.1   102 = 100  10–2 = 0.01   103 = 1000  10–3 = 0.001   104  =  10000  10–4 = 0.0001 ------------------------------------------------------------------------------------------------------------------- 
 
Angles:    Acute Angles:  less than 90 degrees Obtuse Angles:   more than 90 degrees Right Angles:   90 degrees Straight Angle:   180 degrees    Complementary Angles:   Two angles the sum of whose measures is 90 degrees  Supplementary Angles:   Two angles the sum of whose measures is 180 degrees   
 
 
 
 
 
 
Triangles:   Triangles:    Sum of the interior angles is 180 degrees  Isosceles Triangle:   Two equal sides; two equal angles  Equilateral Triangle:  Three equal sides;  three equal angles
 
Right Triangles - Pythagorean Theorem:  a2 + b2 = c2, where a and b are the measures of the legs of the triangle and c is the hypotenuse.
 
---------------------------------------------------------------------------------------------------------------------
 
Statistics:  
 Mean (average) =  sum of all values divided by number of values Median =   middle value when the values are arranged numerically Mode =   the data value that occurs most frequently  --------------------------------------------------------------------------------------------------------------------    Probability: P(A) =   sizesampletotal Aoffrequencythe
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5).
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7).  The volume of a cylinder is

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3 years ago
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Answer:

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Step-by-step explanation:

1.  The result should by a 2 digit number.

So, I fix a two digit number first, say 60.

Then, I multiplied it by some random integer, say 4 and got 240.

Now, 240 is my dividend and 4 is my divisor.

My division problem is:

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2.  The result should be a 3 digit number.

So, I fix a three digit number first, say 600.

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6 0
4 years ago
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Andreyy89

Answer:

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Step-by-step explanation:

In this case, if we draw the point on the xy cartesian plane, we know that the value of "x" is 4.5 and the value of "y" is 0.

Which means that when I draw this in any way, the maximum value it will take is 4.5 units, therefore the radius should not exceed this value, nor should it be less than 4.5 units since the circle would be distorted.

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