Find the rectangular coordinates of the point with the polar coordinates ordered pair negative 7 comma 5 pi divided by 3. a) ordered pair 7 divided by 2 comma negative 7 divided by 2 b) ordered pair 7 square root 3 divided by 2 comma negative 7 divided by 2 c) ordered pair negative 7 divided by 2 comma 7 divided by 2 d) ordered pair negative 7 divided by 2 comma 7 square root 3 divided by 2

We have that

(r, ∅)> (-7, 5 pi/3)

we know that
5 pi/3> 300°> -60°
To convert polar cordinates in rectangular one with use the following formula:
x=r*cos ∅> x=-7*cos -60°> x=-7*(1/2)> x=-7/2
y=r*sin ∅> y=-7*sin -60>  y=-7*(-√3)/2> y=7√3/2

the answer is the option
D) ordered pair negative 7 divided by 2 comma 7 square root 3 divided by 2

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle

Answer to your question: a. the fundamental theorem of algebra tells you that the equation will have two complex roots since the degree of the polynomial is 2. the roots are ​ x=1±i7√2 .number of roots=degree of polynomialhere, degree of polynomial is 2 so number of roots will be 2.hope it *_*