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3 years ago

Express the polar coordinates (-1, 180) as Cartesian coordinates.

1 answer:

6 0

Answer: The correct point is (1, 0)

In polar coordinates, the first number is the distance from the origin in any direction. The second number is an angle measurement that tells us the direction to go from the origin.

Therefore, we have to move -1 one unit (or backwards) from the origin. Now, all we need to know is the direction to move.

The second number is 180, so we make an angle of 180 degrees and move in that direction.

But where do we start?

We always start from the origin straight right along the x-axis. That is degrees 0. So a 180 degree angle would move us left along the x-axis. But remember, we are moving back 1 space, so we will end up at (1, 0).

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I understand this question is really easy but the answer I found isn't one of the options and I have spent 30 minutes on this as

Virty [35]

Rose 40%
original=100%, now it is 140%

140% of original=now
140% of orignal=350
1.4 of original=350
divide both sides by 1.4
original=250

answer is C
other way

350/140=x/100
35/14=x/100
times both sides by 1400
3500=14x
divie both sides by 14
250=x

C is answer

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3 years ago

Calculate the volume of liquid that

mel-nik [20]

Answer:

Step-by-step explanation:4321

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4 years ago

What line would be parallel to 8x-2y=7 with a point of 12,1

SOVA2 [1]

Answer:

$y = 4x - 47$

Step-by-step explanation:

Equation of a line:

The equation of a line has the following format:

$y = mx + b$

In which m is the slope and b is the y-intercept.

Parallel lines:

When two lines are parallel, they have the same slope.

8x-2y=7

Placing into the format, we have thtt:

$2y = 8x - 7$

$y = 4x - \frac{7}{2}$

Slope of 4.

This means that the desired line has the following equation:

$y = 4x + b$

Point of (12,1)

This means that when $x = 12, y = 1$

We use this to find b.

$y = 4x + b$

$1 = 48 + b$

$b = -47$

So, the line has the equation:

$y = 4x - 47$

7 0

3 years ago

HELP PLS? BRAINLIST WILL BE REWARDED

GarryVolchara [31]

Answer:

Step-by-step explanation:

y = $\frac{1}{5}x + 2$

Find two points

When x = 0 , y = 0 + 2 = 2

D(0 , 2)

When x = 5;

$y=\frac{1}{5}*5+2= 1 + 2 = 3$

E(5, 3)

Plot (0, 2 ) and (5 , 3) in the graph and join the points. This will be the line for the equation y =(1/5)x + 2

y = -x + 8

When x =4 , y = -4 + 8 = 4

A(4 , 4)

When x = 6 ; y = -6 + 8 = 2

B(6 , 2)

Plot (4,4) and (6, 2) in the graph and join the points. This will be the line for the equation y = - x + 8.

This lines will intersect at point (5,3) and that point will be the solution of the equation.

8 0

3 years ago

Jon and Lexi are playing a marble game. According to their rules, 4 points are awarded for each red marble collected and 3 point

Fittoniya [83]

It would be 4r + 3b because If one red marble worth four points and blue marble worth 3 points each then we need to multiply the total number of marbles and calculate the sum. It would give the total number of points.

4 0

3 years ago

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