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Brut [27]
3 years ago
6

A quadratic polynomial which has zeros at -7 and 5. ?

Mathematics
1 answer:
Aleonysh [2.5K]3 years ago
4 0

Answer:

x^2 + 2x - 35

Step-by-step explanation:

Sum of zeros

= - 7 + 5

= - 2

Product of zeros

= - 7 x 5

= - 35

x^2 - ( sum of zeros )x + product of zeros

= x^2 - ( - 2 ) x + ( - 35 )

= x^2 + 2x - 35

The Quadratic polynomial is x^2 + 2x - 35.

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The sum of the radius of the base and the height of a solid cylinder is 37m. If the total surface area of the cylinder is 1628 m
MA_775_DIABLO [31]

Answer:

4618.14m^{3} or 4618m^{3}  

Step-by-step explanation:

From  T.S.A = 2\pirh + 2\pir^{2}

 where T.S.A = 1628m^{2}

           1628 = 2\pirh + 2\pir^{2}

            1628 =  ( rh + r^{2} ) 2\pi

 by dividing both side by 2\pi

             \frac{1628}{2\pi }=  rh + r^{2}

          259.10 = rh + r^{2}

           rh = 259.10 - r^{2}

        h = \frac{259.10 - r^{2} }{r}   <u>          </u>(1)

From Radius + Height = 37

       r + h = 37  <u>              </u>(2)

by substituting eqn 1 into 2

    r + \frac{259.10 - r^{2} }{r}   = 37

by multiplying r to both side

   r^{2} + 259.10 - r^{2} = 37r

     259.10 = 37r

   r = \frac{259.10}{37}

   r = 7.00 ≅ 7  

From Eqn 2

     r + h = 37

     7 + h = 37

     h = 37 - 7

     h = 30

so Volume of a cylinder = \pi r^{2} h

                  V = \pi * 7^{2} * 30

                  V = 4618.14m^{3}  ≅  4618m^{3}  

4 0
4 years ago
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A paint store sells exterior paint for $35.25 a gallon and paint rollers for $7.50 each write an equation in standard form of th
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Answer:

35.25p + 7.5r = 185

Step-by-step explanation:

  Gallons of paint:  p

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  35.25p + 7.5r = 185

7 0
3 years ago
10. What is the area of a triangle with base 4cm and
sergiy2304 [10]

Step-by-step explanation:

Area of triangle = 0.5(4)(8) = 16cm² (D).

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3 years ago
If you gave to pay $14,000 and you pay 75% of it how much do you have left to pay?
Mars2501 [29]
So, what you do for this problem is that you multiply $14,000 x 0.75
The answer would be $ 10500. You would need to pay $ 10,500.
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What is the ratio 17 to 23
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The ration can be written as :

17 to 23
17 : 23
17 / 23
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