Answer:
b=74
Step-by-step explanation:
You just gotta use sum of angles in a triangle and sum of angles on a straight line.
Answer:
7, 13 3,7 17,3 13,2
Step-by-step explanation:
Answer:
x = 35
Step-by-step explanation:
You have to make both equation equal to each other.
4x+7 = 6x -63
subtract 6x and 7 from both sides sides
-2x = -70
divide -2 on both sides
x = 35
Answer:
25 questions
Step-by-step explanation:
At a math competition 2 students can answer 40 questions in 1 hour.
Therefore, 1 student can answer in 1 hour = 
= 20 questions
5 students can answer in 1 hour = 20 × 5 = 100 questions
60 minutes = 1 hour
15 minutes =
= 0.25 hours
5 students can answer in 0.25 hours = 100 × 0.25
= 25 questions
5 students could answer 25 questions in 15 minutes.
I hope this helps you
23+9=x-9+9
x=32