The ratio of the sum of my favorite number and 9 to 15 is the same as the ratio of 3 to 5. what is my favorite number?

Let

x> my favorite number

we know that

(x+9)/15=3/5> 5*(x+9)=15*3> divide by 5 both sides> (x+9)=3*3

x+9=9> x=0

therefore

the answer is

My favorite number is 0

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: