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2 years ago

I forgot how to do this. please give me a example on how i do this thank u

Mathematics

1 answer:

nydimaria [60]2 years ago

4 0

Answer:

$t \in \mathrm {R}$

Step-by-step explanation:

$2t + 6 = 2(t + 3)$

$2t + 6 = 2t + 6$

$2t + 6 - 2t = 2t - 6 - 2t$

$6 = 6$

$t \in \mathrm {R}$

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Please help! Correct answer only, please! Consider the matrix shown below: Find the inverse of the matrix A: (i.e Find A^-1).

lina2011 [118]

Answer: a)

<u>Step-by-step explanation:</u>

Matrix multiplication is the sum of Row 1 (of first matrix) x Column 1 (of second matrix) ...repeat for each row.

Transpose means to switch the rows to columns.

$A=\left[\begin{array}{cc}5&2\\3&-1\end{array}\right] \qquad \times \qquad A^T=\left[\begin{array}{cc}5&3\\2&-1\end{array}\right] \\\\\\= \left[\begin{array}{cc}5(5)+2(2)&5(3)+2(-1)\\3(5)+(-1)(2)&3(3)+(-1)(-1)\end{array}\right] \\\\\\= \left[\begin{array}{cc}29&13\\13&10\end{array}\right]$

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3 years ago

Use a table to find the solution to the situation.

AysviL [449]

Answer:

245+45x=170+60x

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3 years ago

A bicyclist travels at a constant speed of 18 mi/h. How long does it take the bicyclist to travel 90 mi

Stells [14]

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3 years ago

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Subtract (-8+2x^3) from (3x^3-4-3x)

Harman [31]

$\to \sf(3x^3-4-3x) - (-8+2x^3)$

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2 years ago

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The 2 main support rods for a barbeque grill are each 7.5 cm from the centre of the

sukhopar [10]

Answer:

58.1 cm

Step-by-step explanation:

The length of each support rod can be found using the Pythagorean theorem. The geometry can be modeled by a right triangle, such that the distance from centre is one leg and half the length of the rod is the other leg of a triangle with hypotenuse equal to the radius of the grill.

<h3>Pythagorean theorem</h3>

The theorem tells us that the sum of the squares of the legs of a right triangle is the square of the hypotenuse. For legs a, b and hypotenuse c, this is ...

c² = a² +b²

<h3>application</h3>

For the geometry of the grill, we can define a=7.5 and c=30. Then b will be half the length of the support rod.

30² = 7.5 +b²

b² = 900 -56.25 = 843.75

b = √843.75 ≈ 29.0473

The length of each support rod is twice this value, so ...

rod length = 2b = 2(29.0473) = 58.0947

Each support rod is about 58.1 cm long.

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1 year ago