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karlrey4401
23.09.2019 •
Mathematics
Which represents a quadratic function? f(x) = 2x3 2x2 – 4 f(x) = –7x2 – x 2 f(x) = –3x 2 f(x) = 0x2 3x – 3
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Ответ:
A: f(x)=2x^3+2x^2-4 no :degree 3
B: f(x)=-7x²-x²=-8x² Yes.
C: f(x)=-3x+2 no linear
D: 0x²+3x-3=3x-3 no linear
Answer B
Ответ:
the formula for the cost is
c = l + p
Total cost is £47
Step-by-step explanation:
Let c represent the cost in £ of a monthly phone contract made up of the fixed line rental l in £ and the price p in £ of the calls made.
The formula for the cost, c would be
c = l + p
if the line rental is £35 and the price of calls made is £12, then, the total cost, c would be
c = 35 + 12 = £47