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3 years ago

How many solutions are there to the equation shown below? 7x + 12 = 5x – 8

Mathematics

1 answer:

ExtremeBDS [4]3 years ago

4 0

There is 1 solution. X = -10

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Mashutka [201]

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3 years ago

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A kite is flying 70 feet above the ground and is attached to a string tied to a stake on the ground. The angle of elevation form

Firlakuza [10]

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Veronika [31]

Answer:

$1)\:2\frac{2}{3} ft$

$2)\:4$

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3 years ago

Write the equation log243(81) =4/5

lawyer [7]

Step-by-step explanation:

log243(81)=4/5

81=243^4/5

Option B

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3 years ago

An exterior angle of a regular convex polygon is 40°. What is the number of sides of the polygon?

seraphim [82]

Answer:

option B

Step-by-step explanation:

Sum of interior angles of a polygon with n sides:

$= (n - 2 )\times 180$

$Therefore, Each \ interior \ angle = (\frac{n - 2}{n} )\times 180$

$Sum \ of \ one \ of \ the \ interior \ angle \ with \ its \ exterior \ angle \ is \ 180^\circ$

$[ \ because \ straight \ line \ angle = 180^\circ \ ]$

That is ,

$Exterior \ angle + Interior \ angle = 180^\circ\\\\40^ \circ + (\frac{n-2}{n}) \times 180 = 180^\circ\\\\40 n + 180n - 360 = 180n\\\\40n = 180n - 180n + 360 \\\\40n = 360 \\\\n = 9$

Sum of exterior angles of a regular polygon = 360

Given 1 exterior angle of the regular polygon is 40

Therefore ,

$n \times 40 = 360\\\\n = \frac{360}{40} \\\\n = 9$

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3 years ago