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dexar [7]
1 year ago
13

8x2 +43x +30=0solve for x

Mathematics
1 answer:
storchak [24]1 year ago
8 0

Use the quadratic formula to find the values of x:

x=\frac{-b\pm\sqrt[]{b^2-4ac}}{2a}

Where a, b and c are the coefficients of the quadratic equation.

\begin{gathered} x=\frac{-43\pm\sqrt[]{43^2-4\cdot8\cdot30}}{2\cdot8} \\ x=\frac{-43\pm\sqrt[]{1849-960}}{16} \\ x=\frac{-43\pm\sqrt[]{889}}{16} \end{gathered}

The equation has two solutions for x.

\begin{gathered} x1=\frac{-43+\sqrt[]{889}}{16} \\ x2=\frac{-43-\sqrt[]{889}}{16} \end{gathered}

As decimal numbers:

\begin{gathered} x1=-0.8239 \\ x2=-4.5510 \end{gathered}

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Answer:

Step-by-step explanation:

Call T the top

call G the bottom

T G B is a right triangle

37 at B, 90 at G, thus 53 at BTG

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25 at A, 90 at G, thus 65 at ATG

thus 122 at ABT

law of sines:

sin 25 / BT = sin 12/ 57

so BT = 156 meters (first answer)

now angle ABT = 180 - 12 - 25

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2 years ago
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Step-by-step explanation:its my personal opinion i hope it helps

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3 years ago
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The perimeter = sum of all sides

= 120 + 80 + 50

= 250

So 250 - 3

247

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Now cost of fencing = Rs 20/per meter

= 247 × 20

= Rs 4,940

Now the area of the triangular park can be found using heron's formula

S = (a+b+c)/2

S = (120+80+50)/2

S = 250/2

S = 125

Now

Herons formula = √s(s-a)(s-b)(s-c)

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√125(5)(45)(70)

√5×5×5×5×5×3×3×5×14

After Making pairs

5×5×5×3√14

375√14

Therefore 375√14m is the area of the triangular park

Must click thanks and mark brainliest

7 0
3 years ago
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3 years ago
1 + 1 + 23 + 77 +109 + 4568+ 32?
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Answer:

4811?

Step-by-step explanation:

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