Answer:

Step-by-step explanation:
<u>Similar Triangles</u>
Lines ST and QR are parallel. Thus, angles S and Q are congruent, and angles T and R are congruent.
Considering the triangle PQR, the sum of its internal angles must be 180°:

Substituting the known values:

Solving for R:


Angles S and Q are congruent, thus

Angles T and R are congruent, thus

Summarizing:

60t is your answer
Have a good day
You should try this (20+7)+(10+5)=42
Answer:
9/28
Step-by-step explanation:
9+4+15=28 total balls
9= total red balls
total red balls/total balls= probability of pulling out one red ball
9/28
(Can I have brainliest?)