This is Pythagorean theorem.
We already know a and c.
a = 4 and c = 10
4² + b² = 10²
16 + b² = 100
Subtact 16 from each side.
b² = 84
Square root of each side:
b = ≈9.165 or √84
Hope this helps!
The answer is 6 jus do it
150*30% = $45
$150-$45 = $105
Marco still owes his brother $105
2nd one, hope this helps sorry if i am wrong
