1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kumpel [21]
3 years ago
13

He cartesian coordinates of a point are given. (a) (−9, 9) (i) find polar coordinates (r, θ) of the point, where r > 0 and 0

≤ θ < 2π.
Mathematics
1 answer:
olga_2 [115]3 years ago
5 0
Radius = 
9^2 + 9^2 = d^2
d = sqrt(162), about 12.73

theta = 
atan(9/-9)

is 45°, but in 2nd quad, so add 90

(12.727, 135°)
You might be interested in
Sarah rolls a die twice. What is the probability that she rolls a 3 and then an even number?
vekshin1

Answer:

A) 1/12

Step-by-step explanation:

The sample space of rolling a die is { 1,2,3,4,5,6}

P (getting 3)= The number of "3"'s  in the sample space over the number of items in the sample space

P (getting a 3} = 1/6

P (getting  even)= The number of evens  in the sample space over the number of items in the sample space

P (getting an even} = 3/6= 1/2

Since these are independent events, we multiply the probabilities

P(3, even) = 1/6 * 1/2 = 1/12

6 0
3 years ago
Read 2 more answers
Hya think of a number "m" . She square it, add "y" to the answer and then subtract 7 from it. The final answer is "A". 1) Derive
Bond [772]
<h2><u>Solution (1)</u> :</h2>

Given, to find A we have to :

  • square m
  • Add y to m²
  • Subtract 7 from m² + y

From the question, the following equation can be formed :

=\tt  A = {m}^{2}   + y - 7

Therefore, the formula for finding A = m² + y - 7

<h2><u>Solution (2)</u> :</h2>

The value of A we can derive from the formula is :

=\tt A =  {m}^{2}  + y - 7

Value of m = 3 (given)

Which means :

=\tt A =   {3}^{2}  + y  - 7

=\tt \: A = 9 + y - 7

=\tt A = 9 - 7 + y

\color{plum} =\tt A = 2 + y

Thus, the value of A = 2+y

Therefore, the value of A = <u>2+y</u>

7 0
3 years ago
Can u help this helpless 9th grader ?
nexus9112 [7]

Answer:

y = 4x + 32

Step-by-step explanation:

Given: Temperature at sunrise = 32°F

y is the temperature after x hours of sunrise

Temperature change is 4°F/hour.

The equation of a line in slope intercept form is given by

y = mx +c

where m is the slope, which is the change in value of y to the value of x

and c is the value of y at x = 0

At sunrise, x =0 and y =32

∴ c = 32

Also we see that the change in temperature to that of time is 4/1 = 4

∴ m = 4

Substituting the values of m and c in the equation of line, we have

y = 4x +32


7 0
3 years ago
Read 2 more answers
A box contains 3 marbles, 1 red, 1 green, and 1 blue. Consider an experiment that consists of taking 1 marble from the box, then
bazaltina [42]

Answer:

Below.

Step-by-step explanation:

With replacement the sample space is:

(RR), (GG), (BB), (RG), (RB), (GR), (GB), (BR), (BG).

Without replacement you will not get  2 of the same colour, so it is

(RG), (RB), (GR), (GB), (BR), (BG).

7 0
3 years ago
Select the correct answer.
My name is Ann [436]

Answer:

B

Step-by-step explanation:

That was actually trickier than I thought it would be

I was looking for 4(x-4),   but 4(x-2)(x+2) also works

7 0
3 years ago
Read 2 more answers
Other questions:
  • How would a weather reporter say 0.103 meters of snow
    15·1 answer
  • A model of a car is 6.3 in. long. The scale of the model to that actual car is 1:30. What is the length of the actual car to the
    8·2 answers
  • Please help with slope!
    10·1 answer
  • The ability to examine the variability of a solution due to changes in the formulation of a problem is an important part of the
    5·1 answer
  • Yasmin has a quarter and a nickel. She flipped both coins. What are the chances that both coins land on heads?
    9·2 answers
  • Jenna must run a total of 12 miles on Monday.
    7·1 answer
  • A line is drawn through (–7, 11) and (8, –9). The equation y – 11 = y minus 11 equals StartFraction negative 4 Over 3 EndFractio
    14·2 answers
  • Nina can ride her bike 63,360 feet in 3,400 seconds, and Sophia can ride her bike 10 miles in 1 hour. What is Nina's rate in mil
    7·2 answers
  • What is the value of c in the interval (5,8) guaranteed by Rolle's Theorem for the function g(x)=−7x3+91x2−280x−9? Note that g(5
    9·1 answer
  • They are 14 people is if each person has two slices of pizza how many slices will be left over
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!