Answer:
75$
Step-by-step explanation:
if she already has a amount of money in her account just add that to 75$
By substitution,
1.5x - 6 = -4.5x + 21
6x = 27
x = 4.5
Hence, y = 1.5(4.5) - 6 = 0.75
20% as a decimal = 0.20 × 69.99=£14.00
69.99-14=55.99
volume of the sphere
answer is option C