Answer:
or 
Step-by-step explanation:
we have

Group terms that contain the same variable, and move the constant to the opposite side of the equation

Complete the square. Remember to balance the equation by adding the same constants to each side


Rewrite as perfect squares



There are 63 students in the room, this is because 21 time 3 gives you 63.
Answer:
B: 24(0.3)
Step-by-step explanation:
24 * 0.3 = 7.2
So Mandy spent $7.20 on arts and crafts.
24 - 7.2 = $16.80 remaining.
So this is the final answer is 24 * 0.3
45 degrees is the answer to your problem