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Darina [25.2K]
3 years ago
9

Solving radical/rational equations. -8+√5x=-3​

Mathematics
1 answer:
jek_recluse [69]3 years ago
4 0

Answer:

x = 5

Step-by-step explanation:

-8 + sqrt(5x) = - 3

Inverse operations

-8 + sqrt(5x) = - 3

+8                    +8

sqrt(5x) = 5

^2            ^2

5x = 25

/5      /5

x = 5

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5 0
3 years ago
Find a unit vector that has the same direction as the vector a and the opposite direction of the vector
nasty-shy [4]
The unit vector is given by the following formula:
 a '= (a) / (lal)
 Where,
 a: vector a
 lal: Vector module a
 We are looking for the module:
 lal = root ((- 15) ^ 2 + (8) ^ 2)
 lal = 17
 Same direction:
 a = -15i + 8j
 The unit vector is:
 a '= (1/17) * (- 15i + 8j)
 Opposite direction:
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 Answer:
 
a unit vector that has the same direction as the vector a is:
 
a '= (1/17) * (- 15i + 8j)
 
a unit vector that has the opposite direction of the vector a is:
 
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5 0
3 years ago
Help me quick please --4x-7-3x+4=25
V125BC [204]

Answer:

<h2><em><u>x</u></em><em><u> </u></em><em><u>=</u></em><em><u> </u></em><em><u>32</u></em></h2>

Step-by-step explanation:

4x - 7 - 3x + 4 =25

=> 4x - 3x = 25 + 7

=> <em><u>x = 32 (Ans)</u></em>

3 0
3 years ago
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maks197457 [2]
3.528571429

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5 0
3 years ago
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VladimirAG [237]

Answer:

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Step-by-step explanation:

4.4 x 2.75 = 14.84

       2.75

       4.4

      -------

     (Multiply it out)

3 0
3 years ago
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