Answer to this equation 5x^2+2=7

x= 1  and x= -1

Step-by-step explanation:

(subtract 2 from both sides)

(divide by 5 from both sides)

(take the square root from both sides)

x=±√1

so,

x= 1

and

x= -1

I believe it is 37 humans and 37 horses

Step-by-step explanation:

Divide the heads by 2, it will equal 37 heads so 37 horse heads and 37 human heads. If they are at a horse race they need 1 human to ride 1 horse so therefore that is why i divides it by 2. (hope thats right)