Answer:
<h3>
B(7, 3)</h3>
Step-by-step explanation:
Point P(5, -1) being the midpoint of AB means that 

and 

Answer:
350
Step-by-step explanation:
If there are 210 girls, then the number of boys is (210÷3)x7=350.
Answer:
n=3.5
Step-by-step explanation:
2²=4
14÷4=3.5
3.5×4=14
3.5×2²=14
Answer:
A
Step-by-step explanation:
Because 45 + 2x = 180 divide it by 2 gives 4
30, you can devide 135 by 4.5