Answer:
they will have 15.02 left over
Step-by-step explanation:
Alex:
21*.35=7.35
21-7.35= 13.65
13.65*.10=1.37
13.65+1.37=15.02
Lara:
21*.65=13.65
13.65*1.10=15.02
They are both correct but the easier way to get the answer is Alex's way.
Answer:

Step-by-step explanation:
To solve the equation, isolate x. Whatever you do to isolate x one on side, you must do to the other.
1) Multiply both sides by 9 to get rid of the fractions.

2) Distribute the 3 to 8x and 15. Then, combine like terms.
3) Move the 66 to the other side, subtracting 18 by 66, then divide each side by 20 to finally isolate x.

Thus,
.
Answer:
C.6x³-33x² + 45x-6
Step-by-step explanation:
(3x-6)(2x^2-7x+1)
= 3x(2x² - 21x +1) -6(2x² - 7x+1)
= (6x³ - 21x² + 3x) - (12x² - 42x+6)
= 6x³ - 21x² + 3x -12x² + 42x -6
= 6x³-33x² + 45x-6
43.3%
Explanation:
30 Students total
13 boys
13/30=.43333