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Tcecarenko [31]
3 years ago
15

Solve the equation

Mathematics
1 answer:
denpristay [2]3 years ago
3 0

Answer:B

Step-by-step explanation:

4x2 =121

4x2-121=0

using the general formula

[-b( +/-) √b2-4ac]/2a

a=4, b= 0, c=-121

x= [0 ( +/-)√02-(4*4*-121)]/2.4

= ( +/-)√1936)/8 = ( +/-)5.5

x =5.5

x = -5.5

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The sum of twice a number and 15 is grater the 3
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Answer:

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Step-by-step explanation:

The expression you need to solve for this is: 2x+15>3

For now pretend that the > is a = and solve as you normally would for x.

Subtract 15 from both sides

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What algebraic expression represents the phase “two times the quantity of a number minus 12”
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Step-by-step explanation:

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san4es73 [151]

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\huge\boxed{\sf x = -2}

Step-by-step explanation:

\sf h(x) = 5x+2\\\\Put \ h(x) = -8\\\\-8 = 5x+2\\\\Subtract \ 2 \ to \ both \ sides\\\\-8-2 = 5x\\\\-10 = 5x\\\\Divide\ both \ sides \ by \ 5\\\\-10 / 5 = x \\\\x = -2 \\\\\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>
8 0
3 years ago
Add: (8a5+2b) + (-6a5+2b)
ser-zykov [4K]
(8a^5 +2b) + (-6a^5 +2b) = (2a^5 +4b)

hope so much that i ve understood it right theses fives are exponents of ,,a"
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