For the first one a = 2.5. For the second one m = 4. For the third one m = -4
Answer
0
Step-by-step explanation:
Let the length be l
We know that,

Right triangle or equilateral(not sure if i spelled it right) triangle
A tangent line is perpendicular to the radius to the point of tangency. Hence QR ⊥ PR. The Pythagorean theorem tells you
(QR)² + (PR)² = (PQ)²
(55 cm)² + (PR)² = (73 cm)²
(PR)² = 2304 cm²
(PR) = √(2304 cm²) = 48 cm
The length of PR is
b. 48 cm
Do the problem backwards!
3/4 decrease numerator and denominator by 1
2/3 increase the numerator and denominator by 1
3/4 is the original fraction.