Answer:
x=20
Step-by-step explanation:
x+2x+x+10=90
4x+10=90
4x=90-10
4x=80
x=80/4
x=20
To answer this you have to use Pythagoras's theorem: a^2 + b^2 = c^2
Put in the values:
5^2 + 15^2 = c^2
Simplify it:
25 + 225 = c^2
Simplify again:
250 = c^2
Square root both sides:
15.8113883008 = c
So the ramp is:
15.8113883008 feet
Now round the number:
15.8ft
The above is the answer :)
(btw sorry in advance if you've spotted a mistake)
<span>What will be the cost of the glass to cover the picture?
</span>
D.$21.78