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3 years ago

Elevator is on the 16th floor. It goes up 12 floors, down 7 floors, up 3 floors, and then down 5

Mathematics

1 answer:

seropon [69]3 years ago

6 0

Answer:

The elevator stops on the 19th floor.

Step-by-step explanation:

On the 16th floor, goes up 12 floors:

16 + 12 = 28

On the 28th floor, goes down 7 floors:

28 - 7 = 21

On the 21st floor, does up 3 floors:

21 + 3 = 24

On the 24th floor, goes down 5 floors:

24 - 5 = 19

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Write the equation of a circle with a center at (-2, 3) and a radius of 4.

Ivan

Answer:

The equation of a circle:

$(x+2)^2+(y-3)^2 = 16$

Step-by-step explanation:

The equation of a circle:

$(x-h)^2+(y-k)^2 = r^2$

(where the center is known as $(h,k)$ and the radius, known as $r$ ).

-Since you already have the center and the radius, use them for the equation of a circle:

Center: $(-2,3)$

Radius: $4$

$(x+2)^2+(y-3)^2 = 4^2$

After you have the equation of a circle, simplify the radius by the exponent $2$ :

$(x+2)^2+(y-3)^2 = 16$

So, you have found the equation of a circle.

5 0

3 years ago

3/4 ÷ 1/4 what is the answer

koban [17]

(3/4) / (1/4)...when dividing fractions, " flip " what u r dividing by, then multiply.

3/4 * 4/1 = 12/4 reduces to 3

7 0

4 years ago

Read 2 more answers

Can anyone help me with this problem ?

Elena L [17]

Come now ! I'm sure you could unravel it if you look at it and think about it
for a minute or two.

What's an angle bisector ? It's a line that splits an angle exactly in half.
The two little angles on each side of it are EQUAL. Each of them is exactly
half of the big angle.

So in this drawing, (3/2 x - 6) is equal to (1/4 x + 4) .
Do you think you could find 'x' ?

3/2 x - 6 = 1/4 x + 4

Add 6 to each side of the equation: 3/2 x = 1/4 x + 10

Multiply each side by 4 : 6 x = x + 40

Subtract 'x' from each side: 5 x = 40

Divide each side by 5 : x = 8

Angle CBD is 1/4 x + 4 . That's 1/4 (8) + 4 = 2 + 4 = <u>6 degrees </u>

3 0

3 years ago

Can someone help? i really don’t understand. question is in the picture

Delicious77 [7]

Answer: (-1,2)

Step-by-step explanation:

5 0

3 years ago

Which equation represents a line perpendicular to the line shown on the graph?

Vadim26 [7]

Answer:

See description below.

Step-by-step explanation:

To choose the correct equation, find the slope of the line on the graph. Identify two points on the line. Then subtract to find their rate of change using the slope formula.

$m=\frac{y_2-y_1}{x_2-x_1}$

When you know the slope, find the negative reciprocal. For example, if the slope is 2/1 then the negative reciprocal is -1/2. This is the slope of a perpendicular line to a line with slope 2. Choose the equation which has this same slope.

Example:

y = 2x -1

y= -1/2 +5

4 0

3 years ago