Answer: He bought 7 pens.
Step-by-step explanation:
21/3 = 7
Answer:
5 + 2(3 + 2x) = x + 3(x + 1) has no solution
Step-by-step explanation:
Answer:
6 square inches
Step-by-step explanation:
8 White
6 Black
4 Blue
5 Brown
Total=8+6+4+5=23
1. White to brown = 8:5
2. Blue to non-blue =4:(23-4) = 4:19
3. Black to all = 6 : 23
4. Ratios equivalent to Q1, 8:5
Multiply ratio by integer factors:
2(8:5)=16:10
3(8:5)=24:15
4(8:5)=32:20
etc.