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Otrada [13]
3 years ago
13

A woman is now 8 times as old as her son Michael. Two years ago, she was 15 times as old as Michael. Form an equation and solve

it.
Mathematics
2 answers:
Goshia [24]3 years ago
8 0
W = the woman's age
m = michael's age

8m = w
15(m -2) = (w-2)

15(m - 2) = (8m - 2)
15m - 30 = 8m - 2
15m - 8m - 30 = 8m - 8m - 2
7m - 30 = -2
7m - 30 + 30 = -2 + 30
7m = 28
m = 4

8m = w
8(4) = w
32 = w

w = 32 years old
m = 4 years old
Delvig [45]3 years ago
5 0

-- Let's call Michael's age 'S'  (for 'son')

-- Right now his mother's age is 8 times his age ... 8s

-- Two years ago ...

                   son was (S - 2) years old

                   mother was  (8s -2) years old.

                   she was 15 times her son's age.

--  So          (8s - 2)  =  15(s - 2)    <=== this is the equation

                    8s - 2   =  15s - 30

                        - 2   =    7s - 30

                        28   =    7s

                          4   =     s        <=== this is the solution to the equation

-- Michael is  4  now.
   His mother is  (8s) = 32

-- Two years ago, Michael was  2 .
    His mother was (8s - 2) = 30

   30  = 15 x 2      yay !

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Answer:

Step-by-step explanation:

A line perpendicular to the given line has a slope that is the negative inverse of the reference line.  

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2x + 3y = 4

3y=-2x+4

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The reference slope is -(2/3).  The negative inverse is (3/2), which will be the slope of a perpendicular line.  We can write the new line as:

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Any value of b will still result in a line that is perpendicular.  But we want a value of b that will shift the line so that it intersects the point (-3,-5).  Simply enter this point in the above equation and solve for b.

y = (3/2)x + b

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-5 = -(9/2) + b

-5 = -4.5 + b

b = - 0.5

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6 0
2 years ago
7) Find the perimeter of triangle ABC. Round all answers to the nearest tenth.[6 points)
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3 years ago
The perimeter of a rectangle is 20.2 CM and it's area is 24.4 cm squared what is its length and width
erma4kov [3.2K]

Answer:

Length of Rectangle = 4 cm    And

Width of Rectangle = 1.9 cm      

Step-by-step explanation:

Given as :

The perimeter of rectangle = 20.2 cm

The area of rectangle is 24.4 cm

Let the length be L

And width be w

Now Area of rectangle = Length × width  

Or,  24.4 = L × W

And Perimeter = 2 (Length + Width ) = 2 (L + W )

Or,   20.2         = 2(L + W )

Or , L + W = 10.1 cm                   ............ 1

Now, (L - W )²  = (L + W)² -4 LW

Or,   (L - W )²  = ( 10.1)² -4 (24.4)

I.e    (L - W )² = 4.41

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SO , From 1 and 2

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Or, 2L = 8

∴  Length = 4 cm

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<em>The range of the distance for the bus drivers live from school with that of the teachers is estimated to be 5 miles apart</em>

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