<span>(2x-10)^2+x^2=25^2
4x^2-40x+100+x^2=625
5x^2-40x+100-625=0
5x^2-40x-525=0
5(x^2-8x-105)=0
5(x-15)(x+7)=0
x-15=0
x=15 for the short side.
2*15-10
30-10=20 for the long side.
Proof:
15^2+20^2=25^2
225+400=625
625=625 </span>
25 < 1/3x
25 ÷ 1/3 < x
25 × 3/1 < x
75 < x
Since x is greater than 75, Marks brother spent greater than 75 minutes studying.
Answer:
D’(-1,-2)
Step-by-step explanation:
Left = x -2 = 1-2 = -1
down = y-5 = 3-5 = -2
X= -10.5+9.5
X=1
I hope that helped:)