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Alexxx [7]
3 years ago
12

Calcule as seguintes multiplicações:

Mathematics
1 answer:
dezoksy [38]3 years ago
4 0

Answer:

A. 26i

B. 36i^2 + 60x + 25

C. 64x^2 + 112x + 49

Step-by-step explanation:

To get answer in question A, B, and C, use FOIL method

FOIL Method:

(a + b)(c + d) = ac + ad + bc + bd

(pretend x is i)

Question A:

(6 + 4x)(2 + 3x) \\ 12 + 18x + 8x - 12 \\ 26x

Question B:

(5 + 6x)(5 + 6x) \\ {(5 + 6x)}^{2}  =  {36x}^{2}  + 60x + 25

Question C

(7 + 8x)(7 + 8x) \\ {64x}^{2}  + 112x + 49

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Multiple choice please answer please
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Answer:

A

Step-by-step explanation:

Using the cosine ratio in the right triangle

cosA = \frac{adjacent}{hypotenuse} = \frac{AC}{AB} = \frac{2}{3} , thus

A = cos^{-1} (\frac{2}{3} ) ≈ 48° → A

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4 years ago
Can a triangle have an angle that measures of 179 degrees? If so, what type of triangle would it be? A. Yes, such a triangle wou
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I think it would be B
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3 years ago
Which of the points A(−6, 2), B(0, 0), C(4, −2), D(−12, 6), E(−10, 10) belong to the graph of direct variation y=− 1 2 x?
vovangra [49]

ANSWER

B(0, 0),

EXPLANATION

The given points are A(−6, 2), B(0, 0), C(4, −2), D(−12, 6), E(−10, 10).

The equation of the direction variation is

y =  - 12x

The point that belongs the graph of the direct variation must satisfy the variation equation.

Note that the graph of direct variation equation passes through the origin therefore the point (0,0) satisfies it.

0=-12(0)

0=0

This is true

The other points do not satisfy this variation equation, hence they do not lie on its graph

5 0
4 years ago
The size of a bicycle is determined by the diameter of the wheel. You want a 22-in bicycle for your birthday. What is the area o
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3 years ago
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Answer:

1 hour and 30 minutes.

Step-by-step explanation:

While carrying her fancy 360-degree camera, a crew artist Sarah Jane can walk at a rate of 2 miles per hour.

We are asked to determine the time required by Sarah to walk to a place that is 3 miles away from her.

Since Sarah can walk at a rate of 2 miles per hour.

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{Here we have used the unitary method assuming that Sarah walks at a constant rate}

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