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Basile [38]
4 years ago
6

Find the geometric mean. 4a and a; 4a and 2a.

Mathematics
1 answer:
pishuonlain [190]4 years ago
5 0
<span>Solve for "x":
a/x = x/4a
---
x^2 = 4a^2
x = 2a</span>
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What is the solution to 2х2+8х=х2-16?
Yakvenalex [24]

Answer:

double, real root x = -4

Step-by-step explanation:

Please use " ^ " to indicate exponentation:  2х^2 + 8х = х^2 - 16.

Combine like terms:

х^2 + 8х = - 16.

Re-write in the standard form for a quadratic:

х^2 + 8х + 16 = 0

Recognize that this is the square of the binomial x + 4:

х^2 + 8х + 16 = 0  =>  (x + 4)^2 = 0

Solving this last result for x yields the double, real root x = -4.

4 0
3 years ago
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vova2212 [387]

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Step-by-step explanation:

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The sum of three numbers is 132 . the third number is 7 less than the first. the second number is 3 times the third. what are th
katovenus [111]
X+y+z = 132
x = 7+z
y = 3z

(7+z)+3z+z = 132
5z = 132-7
z = 125/5

z = 25 <=====

x = 7+z
x = 7 + 25
x = 39 <=====

y = 3z
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y = 75 <=====

hope it helps :)

8 0
3 years ago
PLEASE HELP !!! ILL GIVE YOU 10 POINTS IF YOU GET THIS CORRECT FOR MY TEST!!!!
kherson [118]

Answer:

Last one. I am 100% positive cause I'm good at this kind of math. If you need help on anything else, let me know

Step-by-step explanation:

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3 years ago
PLEASE HELP. <br> if v1….
Rainbow [258]
I believe the answer is 4.4
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2 years ago
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