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gtnhenbr [62]
3 years ago
9

Simplify the following:

Mathematics
2 answers:
Nonamiya [84]3 years ago
5 0
A. (\frac{w^{-5}}{w^{-9} })^{ \frac{1}{2} } \\  ( \frac{w^{9} }{w^{5} })^{ \frac{1}{2} }   \\ (w^{9-5})^{ \frac{1}{2} }   \\ (w^{4})^{ \frac{1}{2} }  \\  \sqrt{w^{4} } \\ w^{2}
b.(m^{6})^{ \frac{-2}{3} } \\  (\frac{1}{m^{6} })^{\frac{2}{3} }  \\  \frac{ \sqrt[3]{1^{2} } }{ \sqrt[3]{m^{6} }^{2}  }  \\   \frac{ \sqrt[3]{1} }{m^{2*2} }   \\  \frac{1}{m^{4} }
Hope this helps!
Arturiano [62]3 years ago
5 0
<u>Problem A</u>
(\frac{w^{-5}}{w^{-9}})^{{\frac{1}{2}} = (\frac{w^{9}}{w^{5}})^{{\frac{1}{2}} = (w^{4})^{{\frac{1}{2}} = \sqrt[2]{w^{4}} = w^{2}
<u>
Problem B</u>
(m^{6})^{-\frac{2}{3}} = \frac{1}{(m^{6})^{\frac{2}{3}}} = \frac{1}{\sqrt[3]{(m^{6})^{2}}} = \frac{1}{\sqrt[3]{m^{12}}} = \frac{1}{m^{4}}

<u>Problem C</u>
(\frac{3x^{-4}y^{5}}{2x^{3}y^{-7}})^{-2} = (\frac{3y^{12}}{2x^{7}})^{-2} = \frac{(3y^{12})^{-2}}{(2x^{7})^{-2}} = \frac{(2x^{7})^{2}}{(3y^{12})^{2-}} = \frac{4x^{14}}{9y^{24}}


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arsen [322]

Answer:

(A) Always true

(B) Seldom true

Step-by-step explanation:

(A) Both sides of an equation can be multiplied by the same number without this action changing the solution of the equation.

Keyword here is "number".

Multiplying both sides of an equation by an equal quantity (same number) will result in same solution after solving for the unknown in the equation. This is because that numeric quantity can always be removed by dividing both sides of the equation by it or by a factor (or multiple) of it.

EXAMPLE:

For a linear equation, 4x - 6 = 15x

let's find the solution, in other words solve for the unknown value X.

4x - 15x = 6

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x = -6/11

Now multiply both sides of the equation by 3.

3(4x - 6) = 3(15x)

12x - 18 = 45x   ___new equation

Solve for X

12x - 45x = 18

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x = -18/33

Reduce the fraction to its simplest form by looking for a number that can divide both numerator and denominator without remainder. In other words, think of a number that is a factor of 18 and a factor of 33.

That common factor or highest common factor (HCF) is 3.

Go ahead and reduce the fraction.

x will be reduced to -6/11

(B) Both sides of an inequality can seldom be multiplied by the same number, without such action changing the solution set of the equation.

Inequalities are more complex. Operational signs even change sometimes, in the course of finding the solution set of the inequality.

Sometimes, multiplying both sides of an inequality by a given numeric quantity will change its solution set and sometimes, it won't.

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3 years ago
Test the set of polynomials for linear independence. If it is linearly dependent, express one of the polynomials as a linear com
aliina [53]

Answer:

The set of polynomial  is Linearly Independent.

Step-by-step explanation:

Given - {f(x) =7 + x, g(x) = 7 +x^2, h(x)=7 - x + x^2} in P^2

To find - Test the set of polynomials for linear independence.

Definition used -

A set of n vectors of length n is linearly independent if the matrix with these vectors as columns has a non-zero determinant.

The set is dependent if the determinant is zero.

Solution -

Given that,

f(x) =7 + x,

g(x) = 7 +x^2,

h(x)=7 - x + x^2

Now,

We can also write them as

f(x) = 7 + 1.x + 0.x²

g(x) = 7 + 0.x + 1.x²

h(x) = 7 - 1.x + 1.x²

Now,

The coefficient matrix becomes

A = \left[\begin{array}{ccc}7&1&0\\7&0&1\\7&-1&1\end{array}\right]

Now,

Det(A) = 7(0 + 1) - 1(7 - 7) + 0

           = 7(1) - 1(0)

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⇒Det(A) = 7 ≠ 0

As the determinant is non- zero ,

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2 years ago
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Answer:

In traffic, she drove for 3 hours

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Explanation:

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d=136

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v_1=16

The second part of the trip there was no traffic so she could drive 44 mph;

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She traveled for a total of 5 hours;

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let x represent the time in traffic when she traveled at 16 mph

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the time the traffic is clear would be;

t_2=t-t_1=5-x

Recall that distance equals speed multiply by time;

d=v_1t_1_{}_{}^{}+v_2t_2

substituting the values;

136=16x+44(5-x)

solving for x;

\begin{gathered} 136=16x+220-44x \\ 44x-16x=220-136 \\ 28x=84 \\ x=\frac{84}{28} \\ x=3 \end{gathered}

So;

\begin{gathered} t_1=3\text{ hours} \\ t_2=5-x=5-3=2 \\ t_2=2\text{ hours} \end{gathered}

Therefore, In traffic, she drove for 3 hours

and After the traffic cleared she drove for 2 hours.

7 0
1 year ago
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