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Vikki [24]
3 years ago
8

If the mean of the four nurnbers 4, 8, x and12 is 0, chen x is​

Mathematics
1 answer:
Serhud [2]3 years ago
4 0

Answer:

x= -24

Step-by-step explanation:

(4+8+x+12)/4=0

4+8+x+12=0

x= -24

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If the area of an equilateral triangle is 9√3 sq ft, how long is a side?
tensa zangetsu [6.8K]
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What does proporgion mean ​
svetlana [45]

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Help me iwht this one please
EleoNora [17]

Answer:

x = -15

Step-by-step explanation:

In fractional equations we cross multiply the expressions:

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8 0
3 years ago
Choose the correct conic section to fit the equationy=1/8x^2 a. Circle b. Ellipse c. Parabola d. Hyperbola
kvasek [131]
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4 0
4 years ago
Directions - For the following problem, write a paragraph proof to justify each step you make. All work must be neat,
nlexa [21]

$ PS = \frac{4}{3} x

Solution:

Given PRQ is a triangle.

ST is a line parallel to RQ.

$PT = x, \ PQ = 3x,  \ SR=\frac{8}{3}x

TQ=PQ-PT

TQ=3x -x=2x

<u>Triangle proportionality theorem,</u>

<em>If a line parallel to one side of a triangle intersects the other two sides, then it divides the two sides proportionally.</em>

$\frac{PS}{SR} =\frac{PT}{TQ}

$\frac{PS}{\frac{8}{3} x} =\frac{x}{2x}

Do cross multiplication, we get

$ PS \times 2x=x \times \frac{8}{3} x

Divide by 2x on both sides, we get

$ PS = \frac{4}{3} x

4 0
3 years ago
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