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Alex787 [66]
3 years ago
5

30 POINTS! x + 1 = 2 ÷ x + 1

Mathematics
1 answer:
Semmy [17]3 years ago
3 0

For this case we have the following equation:

x + 1 = \frac {2} {x + 1}

We must find the value of x + 1:

Multiplying both sides of the equation byx + 1:

(x + 1) ^ 2 = 2

Applying square root on both sides of the equation to eliminate the exponent:

x + 1 = \sqrt {2}

Answer:

Option B

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Traveling with the current, a boat can travel 48 miles in 3 hours. Against the current, it takes 6 hours to go the same distance
drek231 [11]

Answer:

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Step-by-step explanation:

8 0
3 years ago
Assume that T is a linear transformation. Find the standard matrix of T. T: R^3 right arrow R^2 , T(e 1) =(1,2), and T(e2 ) =( -
irina [24]

Answer:

A = \left[\begin{array}{ccc}1&-4&2\\2&6&-6\end{array}\right]

Step-by-step explanation:

Given

T:R^3->R^2

T(e_1) = (1,2)

T(e_2) = (-4,6)

T(e_3) = (2,-6)

Required

Find the standard matrix

The standard matrix (A) is given by

Ax = T(x)

Where

T(x) = [T(e_1)\ T(e_2)\ T(e_3)]\left[\begin{array}{c}x_1&x_2&x_3\\-&&x_n\end{array}\right]

Ax = T(x) becomes

Ax = [T(e_1)\ T(e_2)\ T(e_3)]\left[\begin{array}{c}x_1&x_2&x_3\\-&&x_n\end{array}\right]

The x on both sides cancel out; and, we're left with:

A = [T(e_1)\ T(e_2)\ T(e_3)]

Recall that:

T(e_1) = (1,2)

T(e_2) = (-4,6)

T(e_3) = (2,-6)

In matrix:

(a,b) is represented as: \left[\begin{array}{c}a\\b\end{array}\right]

So:

T(e_1) = (1,2) = \left[\begin{array}{c}1\\2\end{array}\right]

T(e_2) = (-4,6)=\left[\begin{array}{c}-4\\6\end{array}\right]

T(e_3) = (2,-6)=\left[\begin{array}{c}2\\-6\end{array}\right]

Substitute the above expressions in A = [T(e_1)\ T(e_2)\ T(e_3)]

A = \left[\begin{array}{ccc}1&-4&2\\2&6&-6\end{array}\right]

Hence, the standard of the matrix A is:

A = \left[\begin{array}{ccc}1&-4&2\\2&6&-6\end{array}\right]

6 0
3 years ago
A lighthouse has a shadow that is 36 feet long.
VLD [36.1K]
To find this it would be 36/3=4/x
Then cross multiply
36*4/3
That’s the answer
5 0
3 years ago
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Square root of 40<br><br>40<br>1, 40<br>2, 20<br>4, 10<br>5, 8
Lesechka [4]
<span>2*(10) as your answer. </span>
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Tranny a method for Simplifying
san4es73 [151]

Answer:

x=0

Step-by-step explanation:

120521x=0

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