The ladder makes a rectangle triangle with the floor and wall, the ladder is the hypothenuse. So we use Pythagoras theorem: <span>the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides
</span>So we have:
hyp^2 = wall^2 + floor^2
and plugging data in:
18^2 = wall^2 + 7^2
324 = wall^2 + 49
wall^2 = 275
<span>wall = 16.58
</span>
Answer:
25
Step-by-step explanation:
take the square root of 24^2+7^2
You're looking for the percentage in decimal form in the equation. We'll call it x for right now. So whatever x is it will be multiplied to 3.20 and subtracted from 3.20 to equal 2.40. So, our equation will look like this
3.20-x(3.20)=2.40
subtract both sides of the equation by 3.20 to get
-x (3.20)=2.40-3.20
-x (3.20)=-.80
now divide both sides of the equation by -3.20 to single out x on the left side
x= -.80/-3.20
x=.25
to turn this back into a percentage, we move the decimal to the right 2 places
.25=25%
