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GarryVolchara [31]
3 years ago
7

What is an equation?

Mathematics
1 answer:
valentina_108 [34]3 years ago
7 0
An equation is expersions that are equal.
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What are the roots of the equation x^2+6x-9=0
Mila [183]

Answer:

x = approx. 1.24 or -7.24

Step-by-step explanation:

It's hard to factor directly so we should use the quadratic formula or complete the square. I'm going to go with completing the square.

x²+6x-9=0

x²+6x=9

x²+6x is the same as x²+2·3·x, in order to make this into the algebraic identity (A+B)²=A²+2AB+B², we must add B², or in this case 3² to both sides. (A is x, B is 3)

x²+6x+9=18

(x+3)²= 18

x+3= ±√18

x= ±4.24 -3 (approximately 4.24)

First solution for  x = 4.24-3 = 1.24

Second solution for x = -4.24-3 = -7.24




4 0
3 years ago
solve for x and round to the nearest tenth. this is geometry. I will mark Brainliest. please help <3
Amiraneli [1.4K]

Answer:

x= 41.8°

Step-by-step explanation:

use inverse trig to find x.

sin^{-1}(\frac{4}{6})=x

type this into your calculator. (make sure the mode on your calculator is degree or it won't work)

x= 41.8

Hope This Helps:)

brainliest please

5 0
2 years ago
A quadrilateral is sometimes a square? <br><br> True or False
Vesnalui [34]
I know this ...... it is false
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3 years ago
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Translate 5 times a number decreased by 2 into algebraic equation.
iragen [17]

Hello from MrBillDoesMath!

Answer:             5n - 2  

where "n" is the number mentioned in the problem statement

Thank you,

MrB

3 0
3 years ago
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Analyze the diagram below and complete the instructions that follow.
juin [17]

Answer:

Hello

Step-by-step explanation:

the Pythagoras Theorem proves this

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