13 more than 4 times a number is negative 91 how would i find the number?

13 more than 4 times a number is negative 91 

Convert to numbers: 

13 more than 4: 4+13

times a number: (x)

is negative 91: = -91

Put it together: 

4x+13=-91

                   x = -26                  

In mathematical expression, it would be:
4x + 13 = -91
4x = -91 - 13
4x = -104
x = -104/4
x = -26

So, your final answer is -26

Hope this helps!

Answer: r=4.5  feetexplanation: radius  r  is half of the diameter  d,⇒r=d2=92=4.5  feetidk i could be wrong