Answer:
33
Step-by-step explanation:
7x3=21
4x3=12
21+12=33
The true answer is
<span>one-half the height between the crest and the trough (check your physics lesson)</span>
Answer:
Step-by-step explanation:
- 3 = 
+ 2x ...... <em>(1)</em>
(1) × 12 :
3x - 36 = 4 + 24x
21x = - 40
x = - 
= 
Answer:
5
Step-by-step explanation:
u can add 2 and 3 when their base number (3) are the same
Answer:
5 8
Step-by-step explanation:
Coefficient of x should be 5 so first ? should be 5 let the second ? = z
5×6-9×z=-42
30+42=9z
z=8
