Apoint has polar coordinates (r, ф) and rectangular coordinates (x, y). if you know r and y, then:

a) it is not possible to calculate the polar or cartesian coordinates
b) possible to get the polar coordinates but not the cartesian coordinates
c) possible to get cartesian coordinates, but not polar coordinates
d) possible to get cartesian coordinates and polar coordinates

well, let's say we know "r" and also "y", can we get the angle and the rectangular "x"?

and once we know what angle θ is, since x = rcos(θ), we know "r" already, and we know θ as well, so we know "x" as well.

4 adults and 12 babies

step-by-step explanation:

4 x 7 = 28

12 x 15 = 180

180 + 28 =208

4 x 3 = 12

3/4 ÷ 3/4

step-by-step explanation:

basically divide any proper fraction with itself to fit the criteria.

so if we are using 3/4, then:

3/4 ÷ 3/4 = 1

so 1 is the quotient.

and the numerators for both these fractions is 3.   and if we divide the numerators:

3 ÷ 3 = 1

we see that quotient is equal to our original quotient as well.