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Anni [7]
3 years ago
5

Three times a number, X, increased by four is equal to five times the number, x. Which equation can be used to solve for x?

Mathematics
2 answers:
Alexeev081 [22]3 years ago
3 0

Answer:

B

Step-by-step explanation:

3x+4=5x

Otrada [13]3 years ago
3 0

Answer:

3x+4 = 5x

Step-by-step explanation:

if its 3 times is its going to be 3x (because that's 3 times x)

increased by four is +4, so it will be 3x+4

equal to 5 times x is =5x (because x is multiplied by 5)

so it would be 3x+4 = 5x

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Step-by-step explanation:

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Solve for x use the completing the square method x^2+6x=5
Mrac [35]

Answer:

x_{1} =-3 +\sqrt{14} \\\\x_{2} =-3 -\sqrt{14}

Step-by-step explanation:

x^{2}+6x-5=0

we divide the coefficient of the X by half :

in this case: 6/2 = 3 , then we do the following

The result obtained is raised to square power:  3^2=9

we sum and subtract by 9 to maintain the balance of the equation:

x^{2}+6x+9-9-5=0

we have:

(x+3)^{2}-9-5=0

(x+3)^{2} = 14

lets apply square root on both sides of the equation:

\sqrt{(x+3)^{2}}=\sqrt{14}

we know:

\sqrt{a^{2}} = abs(a)

so we have:

abs(x+3)=\sqrt{14}

from where two solutions are obtained

x_{1} + 3 =\sqrt{14} \\\\x_{2} + 3 =-\sqrt{14}

finally we have:

x_{1} =-3 +\sqrt{14} \\\\x_{2} =-3 -\sqrt{14}

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3 years ago
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Step-by-step explanation:

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2 years ago
She arrived at the car park at 2.15pm and leaves at 4.45pm on Thursday. how much does Diane pay for her car parking? Monday - Fr
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Answer:

£4.50

Step-by-step explanation:

She is at the car park for 2 hours and 30 minutes.

It would be £4.50 because 2 hours and 30 minutes is between 2-4 hours.

It can't be £3.00 because it would be too little time (2 hours or less) and it wouldn't be £5.50 because she would be paying for more time than she was there for (5 hours or more).

Hope this helps :)

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2 years ago
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