1 A person that is 5 feet tall casts a shadow that is 2 feet long. At the same time, a building casts a shadow that is 50 feet long. How tall is the building?
feet

answer: 180

step-by-step explanation:

12-2=10

20-2=18

10x18=180

attachment?

step-by-step explanation:

option (a)

step-by-step explanation:

step 1:   take 2 number whose product equal to 25..

and sum of those two number are -10

step: 2 for example here if we take 5,5 are the number,,

5*5=25

and

5+5=10

but we need -10

so if we take   -5,-5

so -5*-5=25

and -5+(-5)=-10

s0

come the equation

replace -10x by these number

like -5x -5x+25

take common

x(x-5)-5(x-5)=0

(x-5)(x-5)=0