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amid [387]
3 years ago
15

Reflection across the y-axis

Mathematics
1 answer:
attashe74 [19]3 years ago
7 0
(4,2) is the answer
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2 1/2 + (-1/3)<br> PLz, help me with this question.
dem82 [27]

Answer:

2 1/6

Step-by-step explanation:

7 0
3 years ago
Write the equation of a line, in general form, that has an slope of zero and a y-intercept of (0,4).
vaieri [72.5K]

Answer:

y - 4 = 0

Step-by-step explanation:

They give you the y coordinate, 4, and the x coordinate as 0.

Put 4 in as y.

4 - 4 = 0. That means x = 0 and that is right.

To make sure it has a slope of zero, subtract 4 on both sides.

You get : y = 4. This means that the line will be straight and it will have a slope of zero.

7 0
3 years ago
A 100% increase followed by a 50% decrease
just olya [345]

Answer:

We end up with our original number

Step-by-step explanation:

Let x be our number

We increase by 100

increase = old number * 100%

increase = x*1

increase = x

New number = old number + increase

                       = x+x

                         =2x

Now we decrease by 50%

decrease = number *50%

                = 2x*.5

                =x

Final number = new number - decrease

                       = 2x-x

                         =x

4 0
4 years ago
Read 2 more answers
Use function notation to write the equation of the line.<br><br> please help
umka21 [38]

Therefore the equation of the line in function-form is f(x)=-2x-1

An equation of a line on the cartesian plane is given by y=mx+c. Here m denotes the slope of the line and c denotes the y-intercept.

Slope of a line is defined as the inclination of the line along the positive   x- axis . Slope is calculated by the formula m=\frac{y_2-y_1}{x_2-x_1}. where (x_1,y_1) and (x_2,y_2) are two points on the line.

y-intercept is defined as the point where the line passes through the y-axis.

From the graph we can see that the line passes through (0,-1)and (-1,1)

therefore slope of the line is

m=\frac{y_2-y_1}{x_2-x_1}\\or, m=\frac{1-(-1)}{-1-0}\\or, m=-2

Now we know that the equation of a line passing through a point (x_1,y_1) and with slope m is given by

y-y_1=m(x-x_1)\\

Substituting the values in the equation we get

y-(-1)=-2(x-0)

or, y=-1-2x

Therefore the equation of the line in function-form is f(x)=-2x-1 .Hence the second option is correct.

To learn more about the equation of the line visit:

brainly.com/question/21511618

#SPJ9

8 0
1 year ago
The top of the Washington Monument is a triangular pyramid with a triangle base. Each triangular face is 58 feet tall and 34 fee
MakcuM [25]

So 4 triangular faces of the pyramid will have total area

<span>= 4 ×<span>12 </span>× base × height = 4 × <span>12 </span>× 34 × 58f<span>t2 </span>= 3944f<span>t2</span></span>

So <span>3944f<span>t2</span></span> of marble cover the faces of the pyramid.

4 0
3 years ago
Read 2 more answers
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