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Feliz [49]
3 years ago
7

Evaluate the expression for x = 4, y=-2, z= -3. 2² + 8zy - y²

Mathematics
2 answers:
Nikitich [7]3 years ago
8 0

the answer is 53 I'm pretty sure

andrew11 [14]3 years ago
3 0

Answer:

Pretty sure its 53

Step-by-step explanation:

9+48-4

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MK and ML are tangent to circle J. If MK = 6x – 15 and ML = 2x + 9, find x. * am i right?? * --> provide details if i'm wrong
Veseljchak [2.6K]

Answer:

Step-by-step explanation:

y^{2} = r^{2}  + (4,2)^{2} \\\\ y^{2} - r^{2} = (4,2)^{2} y^{2} =  r^{2} + z^{2} \\\\ y^{2} - r^{2} = z^{2}\\so: z^{2} = (4,2)^{2}  ----> z = 4,2

3 0
3 years ago
6(a + 5) = 42<br><br> ...................................
Elan Coil [88]
It’s 2 if I did my math right because I did it 2 tones and both of the times I got 2
5 0
3 years ago
A sphere with a radius of 6cm has the same volume as a cylinder with a height of 4.5cm. What is the radius of the cylinder
yawa3891 [41]
Short answer: r = 8
Remark
The easiest way to do this is to solve the sphere's volume in terms of pi. When you do this, you can equate that to the formula for a cylinder and cancel the pi values. 

Step One
Find the volume of the sphere.

<em>Givens</em>
r = 6 cm

<em>Formula</em>
V = (4/3) pi r^3

<em>Sub and Solve</em>
V =  4/3 pi * 6^3
V = 288 * pi

Step two 
Find the radius of the cylinder

<em>Givens</em>
V = 288* pi cm^3
h = 4.5 cm

<em>Formula</em>
V = pi r^h

<em>Sub and solve</em>
288 pi cm^3 = pi r^2 * 4.5    Divide both sides by pi
288 cm^3 = 4.5 r^2              Divide both sides by 4.5
388 / 4.5 = r^2
64 = r^2                                Take the square root of both sides.
r = square root( 64)
r = 8 <<<<< Answer

4 0
3 years ago
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(82,82,) (x+y) answer short
8 0
4 years ago
In the first round of a local tennis tournament, there are 25 matches. Find the number of matches
LiRa [457]
There are 25 matches
5 0
3 years ago
Read 2 more answers
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