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2 years ago

Help plz6(2x - 11) + 15 = 3x + 12

Mathematics

2 answers:

Ket [755]2 years ago

3 0

Answer:

x = 7

Step-by-step explanation:

Lets do the brackets first,

6 × 2x = 12

6 × -11 = -66

------

Calculate the x constant:

12x - 3x = 9x

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Then the ones with no x:

-66 + 15 = -51

51 + 12 = 63

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Lastly, divide

63 ÷ 9 = 7

-------

Have a good day :)

marusya05 [52]2 years ago

3 0

X = 7

hope this helps you out!

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2 years ago

6. A prism has bases that are equilateral triangles with sides lengths of 10 inches and a length of 30 inches.

eimsori [14]

Answer:

The volume of the prism is $1,299\ in^{3}$

Step-by-step explanation:

we know that

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$V=BL$

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we have

$L=30\ in$

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2 years ago

2a+3b=5 b=a-5 help please

diamong [38]

Answer:

2a + 3b = 5

b = a - 5

Step-by-step explanation:

2a + 3b = 5

b = a - 5

You can write this another way:

2a + 3(a-5) = 5 ( I added the second formula in the first one )

Now you gotta factor out:

2a + 3a - 15 = 5

Here im gonna do plus 15

2a + 3a = 20 ==> 5a = 20

Now if you divide by 5, you get: a = 4

Now you can fill in the second formula again

b = a - 5 (ill fill this in now)

b = 4 - 5 = -1

So, this makes:

a = 4 , b = -1

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2 years ago

Read 2 more answers

Im really bad at this haha

expeople1 [14]

The correct answer is B

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2 years ago

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Studentka2010 [4]

Answer:

The solutions are $x=\frac{1+\sqrt{7}}{2}$ and $x=\frac{1-\sqrt{7}}{2}$

Step-by-step explanation:

we have

$0=-2x^{2}+2x+3$

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$-3=-2x^{2}+2x$

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$-3.5=-2(x^{2}-x+0.5^{2})$

Rewrite as perfect squares

$-3.5=-2(x-0.5)^{2}$

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$x-0.5=(+/-)\sqrt{\frac{7}{4}}$

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2 years ago

Help plz6(2x - 11) + 15 = 3x + 12​

Help plz6(2x - 11) + 15 = 3x + 12