I am interpreting your question as 7 * 3/4. First we multiply 7 and 3 together to get 21. Now we divide 21 by 4. Because 21 isn't divisible by 4 and they share no common factors, 21/4 is our answer.
Step-by-step explanation:
answer is in photo above
Answer:
x = 37.5
Step-by-step explanation:
By Basic Proportionality Theorem:

Answer:
40 millimeters
Step-by-step explanation:
(50)^2=x^2+(30)^2
2500=x^2+900
-900 -900
1600=x^2
40=x