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posledela
3 years ago
11

Simplify (square root 2)( square root of 2^3)

Mathematics
1 answer:
steposvetlana [31]3 years ago
8 0

Answer:

\large\boxed{(\sqrt2)(\sqrt{2^3})=4}

Step-by-step explanation:

(\sqrt2)(\sqrt{2^3})\qquad\text{use}\ \sqrt{ab}=\sqrt{a}\cdot\sqrt{b}\\\\=\sqrt{2\cdot2^3}\qquad\text{use}\ a^n\cdot a^m=a^{n+m}\\\\=\sqrt{2^{1+3}}=\sqrt{2^4}\\\\(1)=\sqrt{2^{2\cdot2}}\qquad\text{use}\ (a^n)^m=a^{nm}\\\\=\sqrt{(2^2)^2}\qquad\text{use}\ \sqrt{a^2}=a\ \text{for}\ a\geq0\\\\=2^2=4\\\\(2)=\sqrt{2\cdot2\cdot2\cdot2}=\sqrt{16}=6\ \text{because}\ 4^2=16

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Lina20 [59]
Fractional form: 63/10 or 6 3/10.
8 0
3 years ago
Can someone help me please
iris [78.8K]

Answer:

"I can find the maximum or minimum by looking at the factored expression of a quadratic function by reading off its roots and taking the arithmetic average of them to obtain the x-coordinate of the quadratic function, and then substituting that value into the function."

Step-by-step explanation:

Because of the symmetry of quadratics (which is the case here because we have two factors of degree 1, so we are dealing with a <em>polynomial</em> of degree 2, which is a fancy way of saying that something is a quadratic), the x-coordinate of the extremum (a fancy way of saying maximum or minimum) is the (arithmetic) average of the two roots.

In the factored form of a quadratic function, we can immediately read the roots: 3 and 7. Another way to see that is to solve (x-3)(x-7)=0, which gives x-3=0 \vee x-7=0 (the 'V' stands for 'or'). We can take the average of the two roots to get the x-coordinate of the minimum point of the graph (which, in this case, is x=\frac{3+7}{2} = \frac{10}{2} = 5).

Having the x-coordinate of the extremum, we can substitute this value into the function to obtain the maximum or minimum point of the graph, because that will give the y-coordinate of the extremum.

6 0
3 years ago
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viktelen [127]

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6 0
2 years ago
which equation represents a line parallel to the line whose equation is -2x+3y=-4 and passes through the point 1,3
Sedbober [7]

Answer:

-2x+3y=7

or

2x-3y= -11

Step-by-step explanation:

-2x+3y= -4, which is Ax+By=C

A=-2 B=3 C=-4

m(slope)= -A/B

m= -(-2)/3

m= 2/3

y-y1= m (x-x1)

y-3= 2/3 (x-1)

Multiply by 3 cancels out the fraction

3y-9= 2 (x-1)

Distributive property

3y-9= 2x-2

-2x+3y-9= -2

From here it could go 2 ways:

1. -2x+3y= 7

or

2. 2x-3y+9= -2

so

2x-3y= -11

Hope this helps

7 0
3 years ago
The population of a nearby town dropped from 7,500 to 6,000 in one year.
jekas [21]

Answer:5,600 - 3,500 = 2,100

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2,100 = X*3,500

X =  2,100 / 3,500

X = .60 or 60%

An average of 15% increase per year.

Step-by-step explanation:

5 0
3 years ago
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