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3 years ago

5

What is the transformation (x,y)->(x,-y)

1 answer:

Lelechka [254]3 years ago

4 0

Answer:

<h2>It's a reflection across the x-axis.</h2>

Step-by-step explanation:

(x, y) → (x, -y)

It's a reflection across the x-axis.

<em>The reflection of the point (x,y) across the x-axis is the point (x,-y).</em>

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A tree 10 meters high casts a 17.3 meter shadow.

sashaice [31]

Answer:

the angle of elevation of the sun is $\approx 30^o$

Step-by-step explanation:

Let's make a diagram of the tree, ground and inclination of the rays of the sun, so we understand what right angle triangle we have. Please see the attached image.

Notice that our unknown is the angle $\theta$ , and that we know the size of the side opposite to it, and of the side adjacent to it. Therefore the most convenient trigonometric formula to use is the tangent of the angle because:

$tan(\theta)=\frac{opposite}{adjacent} \\tan(\theta)=\frac{10}{17.3}\\\theta=arctan(\frac{10}{17.3})\\\theta\approx 30^o$

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3 years ago

BRAINLIEST WILL BE GIVEN TO CORRECT ANSWER (stu.pid answers or links will result in DE4TH)

Serhud [2]

Answer:

2.=3

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Consider the system of equations: Equation 1: -2x + 3y=9 Equation 2 : -8.1 – 7y = 10 Before adding the equations together, which

diamong [38]

The first option :

Multiply the first equation by 8 and the second equation by 2

would not result in the elimination of the variables in this system

5 0

3 years ago

Solve the system of equations using the substitution method. -x − 2y = 0 y = -8x (x, y) = ( , )

marta [7]

Answer:

$= { \tt{(0, \: 0)}}$

Step-by-step explanation:

Let:

${ \bf{ - x - 2y = 0 - - - (a)}} \\ { \bf{y = - 8x - - - (b)}}$

Substitute for y in equation (b) to equation (a):

${ \tt{ - x - 2( - 8x) = 0}} \\ { \tt{ - x + 16x = 0 }} \\ { \tt{x = 0}}$

Also, y = 0

4 0

3 years ago

Rather than use the two scoops of coffee recommended by the manufacturer, a coffee aficionado uses three scoops of coffee per po

Aleks [24]

Answer: Relative error = 50%

Step-by-step explanation:

Relative error Re = Absolute error/True value × 100%

True value = 2 scoops

Measured(used) value = 3 scoops

Absolute error Ae = measured(used) value - True value

= 3 scoops - 2 scoops

Ae = 1 scoop

Re = 1/2 × 100%

Re = 50%

7 0

3 years ago