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mixas84 [53]
3 years ago
14

8) Solve using the Quadratic Formula. x2 + 3x - 5 = 0

Mathematics
1 answer:
maks197457 [2]3 years ago
6 0

Step-by-step explanation:

x^{2} + 3x - 5

For any quadratic equation ax^{2} + bx + c = 0, the quadratic formula is as follows:

\frac{-b \pm \sqrt{b^{2} - 4ac}}{2a}

From the given quadratic equation, we know that a = 1, b = 3 and c = -5. Plugging in these values into the quadratic formula gives us the following:

\frac{-(-3) \pm \sqrt{(3)^{2} - 4(1)(-5)}}{2(1)}

\frac{3 \pm \sqrt{9 + 20}}{2}

\frac{3 \pm \sqrt{29}}{2}

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Vinvika [58]

Answer:

a. 277.3 m²

b. $307.86

Step-by-step explanation:

a. Area of the wall to be painted = area of rectangle - area of triangle

= L × W + ½×a×b×sin θ

L = 17 m

W = 14 m

a = 8.7 m

b = 9.5 m

θ = 72°

Plug in the values into the equation

Area of the wall = (17×14) + (½*8.7×9.5×sin 72)

Area of the wall = 238 + 39.3024105

Area of the wall to paint ≈ 277.3 m²

b. 20 liters of paint of 1 container cost $21.99

If 1 liter of paint covers 1m², therefore,

277.3 m² will need = 277.3 × 1 = 277.3 liters of paint.

20 liters = 1 container of paint

277.3 liters = 277.3/20 = 13.865 ≈ 14 containers

1 container = $21.99

14 containers = 21.99 × 14 = $307.86

8 0
3 years ago
PLEASE HELP!!
saw5 [17]
(0.4×30,000)−5,000
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4 0
3 years ago
PLEASE HELP ME OUT HERE!!! IM STUCK !!!
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3 0
4 years ago
A dragonfly can beat its wings 30 times a second. write an equation in slioe intercept form that shows the relationship between
ivanzaharov [21]

Answer:

1800

Step-by-step explanation:

Since there is the tragon fly beat his wings 30 times a second ,there is 60 hundredths of a second in a second multiply 30 x 60 and you should get 1800.

  1. mulitiply 0x0 = 0

     2.  mulitiply 6x0=0

        3. multiply 3x0=0

          4. mulitiply 6x3 = 18

            5. have 1800

or you can just multiply 6x3 = 18 and add the two zeros

6 0
3 years ago
The integers between -3 and 5
Alisiya [41]

The required integers are -2,-1,0,1,2,3and 4

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