3 years ago

Simplify the expression

Mathematics

2 answers:

Over [174]3 years ago

7 0

Its either 4 or 3.5 depending on how you want it simplified

GREYUIT [131]3 years ago

4 0

√12
= √4 * √3
= 2√3
------------------

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Which of the following is an extraneous solution of the square root of -3x-2=x+2

yarga [219]

Answer:

x=-6 is an extraneous solution

Step-by-step explanation:

we have

$\sqrt{-3x-2} =x+2$

squared both sides

$-3x-2=(x+2)^2$

$-3x-2=x^2+4x+4$

$x^2+7x+6=0$

solve the quadratic equation by graphing

The solution is x=-6 and x=-1

see the attached figure

Verify each solution

substitute the value of x in the original expression

For x=-6

$\sqrt{-3(-6)-2} =-6+2$

$\sqrt{16} =-4$

$4=-4$ ----> is not true

Is an extraneous solution

For x=-1

$\sqrt{-3(-1)-2} =-1+2$

$\sqrt{1} =1$

$1=1$ ----> is true

Is the solution

4 0

3 years ago

-3x minus 2 minus -6x = -4 minus -4x plus 12

DochEvi [55]

-3x-2-6x=-4-(-4x)+12

-9x-2=-16x+12

7x=14

x=2.

You probably got confused with the italicized part.

6 0

3 years ago

Joe spent 15/22 of his pocket money in a story book which costs $75. How many pocket money did he have at first?

ehidna [41]

Answer:

$51.1

Step-by-step explanation:

If Joe spent 15/22 of his pocket money in a story book which costs $75, he had $51.1 at first.

15/22 of 75 = 51.1363636364 or 51.1

6 0

3 years ago

Read 2 more answers

Write the inequality that represents the possible values for x

UNO [17]

Answe8 times 8 equal 69 and bla ba

Step-by-step explanation:

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2 years ago

Please help me, i dont get it :(

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3 years ago