R is a point which is 13 units from the origin if its x co-ordinates is 12 find the possible values of the y co-ordinate

±5

Step-by-step explanation:

Apply the Pythagorean Theorem:

x^2 + 12^2 = 13^2, or

x^2 = 169 - 144 = 25

The possible y-coordinate vaues are ±√25, or ±5

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

94

step-by-step explanation:

average the numbers and use a variable to figure out the minimum to get a 90.

(79+94+91+92+x)/5=90

x = 94