2 years ago

When a number is subtracted from 11, the result is 6 more than the number. Find the number.

Mathematics

2 answers:

Aleks04 [339]2 years ago

7 0

Answer:

2.5

Step-by-step explanation:

11-x=x+6

5-x=x

5=2x

2.5=x

Annette [7]2 years ago

3 0

Answer:

5 = 2x

Step-by-step explanation:

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Charra [1.4K]

Answer:

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Step-by-step explanation:

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2 years ago

Find the value of x² - x+1 when x=√3 -1, in the form a+b√3 where a and b are integers

lidiya [134]

Answer:

$6-3\sqrt{3}$

If you compare this to $a+b\sqrt{3}$ , then $a=6$ and $b=-3$ .

Step-by-step explanation:

We are given $x=\sqrt{3}-1$ and we are asked to find the value of $x^2-x+1$ .

So we will need to find $x^2$ .

$x=\sqrt{3}-1$

Square both sides:

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

Expand using identity: $(x-a)^2=x^2-2ax+a^2$ .

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$x^2=3-2\sqrt{3}+1$

$x^2=4-2\sqrt{3}$

Let's go back to the full $x^2-x+1$ .

$x^2-x+1$

$(4-2\sqrt{3})-(\sqrt{3}-1)+1$

$4-2\sqrt{3}-\sqrt{3}+1+1$

$6-3\sqrt{3}$

If you compare this to $a+b\sqrt{3}$ , then $a=6$ and $b=-3$ .

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3 years ago

one of the comers of a cube is sliced off the resulting cross section will have a minimum of ? Sides ?

Molodets [167]

a corner of a cube connects 3 sides to each other,

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2 years ago

Which operations flips the graph of a function over the x-axis

vovikov84 [41]

The y function
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3 years ago

Read 2 more answers

Regular admission price for a family to enter an amusement park is $345.80. The Patel family used a discount coupon that gave th

mylen [45]

100-35=65
65 over 100 x 345.80
=224.77
345.80-224.77=121.03

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2 years ago