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SOVA2 [1]
3 years ago
7

Please show an explanation

Mathematics
1 answer:
ratelena [41]3 years ago
7 0

Answer:

Step-by-step explanation:

1) Let x be the number of adults and y be the number of students

x + y = 8 --------------(I)

        y = 8 -x

7.25x + 5.50y = 52.75 ----------------(II)

Substitute y = 8 -x in equation (II)

7.25x + 5.5*(8 - x) = 52.75

7.25x + 5.5*8 - x*5.5 = 52.75

7.25x +  44 - 5.5x = 52.75

<u>7.25x - 5.5x</u> + 44 = 52.75

             1.75x + 44 = 52.75

                  1.75x    = 52.75 - 44

                       1.75x = 8.75

                           x = 8.75/1.75

x = 5

Plugin x = 5 in equation 1

y = 8 - 5

y = 3

2)  x = y + 24

x + y = 180   {Supplementary}

y + 24 + y = 180

2y + 24 = 180

      2y = 180 - 24

     2y =  156

        y = 156/2

y = 78

x = 78 + 24 = 102

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If y varies directly as x, and y is 400 when x is n and y is n when x is 4, what is the value of n?
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Help meeeeeeeeeeeeeeeeeeeeeee<br><br><br><br><br> thank you
andreev551 [17]

A polynomial is an expression consisting of indeterminates and coefficients, that involves only the operations of addition, subtraction, multiplication, and positive-integer powers of variables. imports of coffee into a country during this years 1997 is 1.344

<h3>What is a polynomial?</h3>

a polynomial is an expression consisting of indeterminates and coefficients, that involves only the operations of addition, subtraction, multiplication, and positive-integer powers of variables.

P(x)=0.7166x²+6.267x+1.344

when x = 0, it represents 1997

Substitute the value of x as zero in polynomial.

P(0)=0.7166(0)²+6.267(0)+1.344

P(0)=0+0+1.344

P(0)=1.344

The amount of coffee imported in the year 1997 was approximately 1.344 pounds.

Hence amount of coffee imported in the year 1997 was approximately 1.344 pounds.

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I need to find the measure of the arc or angle indicated its internal and external tangents
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