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3 years ago

Any one that knows this please help thanks!

Mathematics

2 answers:

Alex73 [517]3 years ago

8 0

Hereeeeeeeeeeeeeeeeeeeeee

krek1111 [17]3 years ago

7 0

$\frac{x^2-4}{x-8}$ to x = 4

$\frac{4^2-4}{4-8}$

$\frac{16-4}{-4}$

$-\frac{12}{4}$

$-3$

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Use rectangle ABCD and the given information to solve each problem.

solong [7]

Problem 1

<h3>Answers:</h3><h3>angle 6 = 50</h3><h3>angle 7 = 50</h3><h3>angle 8 = 40</h3>

--------------------

Work Shown:

point E = intersection point of diagonals.

x = measure of angle 6

y = measure of angle 8

angle 7 is also x because triangle AED is isosceles (AE = ED)

Focus on triangle AED, the three angles A, E, D add to 180

A+E+D = 180

x+80+x = 180

2x+80 = 180

2x = 180-80

2x = 100

x = 100/2

x = 50

So both angles 6 and 7 are 50 degrees.

Turn to angle 8. This is adjacent to angle 7. The two angles form a 90 degree angle at point A. This is because a rectangle has 4 right angles.

(angle7)+(angle8) = 90

50+y = 90

y = 90-50

y = 40

angle 8 = 40 degrees

=================================================

Problem 2

<h3>Answers:</h3><h3>angle 2 = 61</h3><h3>angle 3 = 61</h3>

--------------------

Work Shown:

Angle 5 is 29 degrees (given). So is angle 4 because these are the base angles of isosceles triangle DEC (segment DE = segment EC)

angle 3 and angle 4 form a 90 degree angle

x = measure of angle 3

(angle 3)+(angle 4) = 90

x+29 = 90

x = 90-29

x = 61

Angle 2 is congruent to angle 3 since triangle BEC is isosceles (BE = EC), so both angle 2 and angle 3 are 61 degrees each.

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4 years ago

Geometry <br> Surface area and volume

Zigmanuir [339]

Answer:

$volume=558.9$

Step-by-step explanation:

find the volume of the cone and the hemisphere and add them together

$Vcone=\pi r^{2} \frac{h}{3} \\\\V=\pi (5.3)^2(\frac{8.4}{3} )\\V=\pi (28.09)(2.8)\\V=247.09\pi \\V=247.1$

<u>hemisphere:</u>

<u></u> $Vhemisphere=\frac{2\pi r^3}{3} \\V=\frac{2\pi (5.3)^3}{3} \\V=\frac{2\pi (148.877)}{3} \\V=\frac{297.754\pi }{3} \\V=\frac{935.421}{3}\\ V=311.8$

<u>add the volumes together:</u>

<u></u> $Vol=247.1+311.8\\Vol=558.9$

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Oksanka [162]

16 % 38 dollars. By proportion:-

100 % = 100*38 / 16 = 237.5 answer

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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