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3 years ago

Please help asap!! no trolls

Mathematics

2 answers:

Tatiana [17]3 years ago

4 0

Answer: Step-by-step explanation

Hunter-Best [27]3 years ago

3 0

Answer:

Explanation:

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How do you find the inverse of a 3x3 matrix?

mel-nik [20]

If you have a graphing calculaator enter the matrix then on the outside of it hit the ^ button and put -1

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3 years ago

What is the value of x in the equation 1.5(x + 4) – 3 = 4.5(x - 2)? O 3 O 4 O 5 09

nasty-shy [4]

Answer:

Step-by-step explanation:

1.5x + 6 - 3 = 4.5x - 9

1.5x + 3 = 4.5x - 9

Bringing like terms on one side

3 + 9 = 4.5x - 1. 5x

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12/3 = x

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3 years ago

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7. Write the following proportion: 8 is to 64 as 2 is to X

Paul [167]

2 is to 4 because 64/8 is 8. 4/2 is 2. 2 x 2 is in proportion to 8 x 8

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3 years ago

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Find the solutions for a triangle with a = 16, c =12, and B = 63º.

maks197457 [2]

Answer:

b. A = 71.6°; C = 45.40°; b =15.0

Step-by-step explanation:

The missing values can be found with the help of the Law of Cosine and properties of triangles:

Side b (Law of Cosine)

$b = \sqrt{a^{2}+c^{2}-2\cdot a \cdot c \cdot \cos B}$

$b = \sqrt{16^{2}+12^{2}-2\cdot (16)\cdot (12) \cdot \cos 63^{\circ}}$

$b \approx 15.022$

Angle A (Law of Cosine)

$\cos A = -\frac{a^{2} - b^{2}-c^{2}}{2\cdot b \cdot c}$

$\cos A = - \frac{16^{2}-15.022^{2}-12^{2}}{2\cdot (15.022)\cdot (12)}$

$\cos A = 0.315$

$A= \cos^{-1} 0.315$

$A \approx 71.639^{\circ}$

Angle C (Sum of internal angles in triangles)

$C = 180^{\circ} - 63^{\circ} - 71.639^{\circ}$

$C = 45.361^{\circ}$

Hence, the right answer is B.

6 0

3 years ago

PLEASE ANSWER PLEASEE!!!!!!!

Montano1993 [528]

Answer:

they would both be 61°

Step-by-step explanation:

when the angles make out a straight line it equals to 180 and 180 subtracted to 119 comes out to 61 and both b and c are vertical angles which would make them congruent

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3 years ago

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