Answer:
for the first one he will get $51
the second one is £2.70
Step-by-step explanation:
Answer:

Step-by-step explanation:
zeroes are when you plug in that x value and get y=0
therefore if you set x = that number and solve for 0 you get a "function"
multiplying these together will yield the complete 3rd degree polynomial
x = 1
x-1=0
x=7
x-7=0
x=-4
x+4=0

If needed you could expand but I'm too lazy
Answer:
This is matter of ratio!
42/150 = x/120. It's 33.6 grams :D
Please Mark Brainliest!!