It should be C but I’m not sure
Answer
- DE= 3x + 20 = 86
- EF= 2x + 40=84
Step-by-step explanation:
DE: 3x + 20
EF: 2x + 40
DE+ EF= DF
3x+20 +2x + 40 = 170
5x + 60 =170
5x= 110
x= 22
- DE= 3x + 20 = 86
- EF= 2x + 40=84
Answer:
C = 66 cm
Step-by-step explanation:
C = pi*diameter
C = pi*21
C= 65.9734457254
C is around 66 cm (when rounded to whole number)
Hmm. Certainly a preset formula that takes an input, performs a calculation, and produces an output is a function.
But other things might be functions as well. Being a function doesn't require an algorithm or preset formula, just some way of describing a single output for every input in the domain. A table would be another way to specify a function. Sometimes we know something's a function but we don't know how to calculate it.
So I'm not sure really what they're after in this question, but I'm going to say FALSE.
First one is -15x^2-20x+40
second one is 2x^3+14x^2-6x
