Which equations are true?

Mathematics

1 answer:

blagie [28]4 years ago

8 0

Answer:

C. none of the above

Step-by-step explanation:

A. x - (- x) is the equivalent of x + x, because subtracting a negative number is the same as adding it's positive counterpart. Therefore, it will be 2x, not -x.

B. Same thing. But this time, 0 - (- x) is the same as 0 + x, which is x, not -x.

Because neither are right, the only answer is C.

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X | f(x)

katovenus [111]

Answer:

Option B.

Step-by-step explanation:

If the value of function is 0 at x=c, then c is a root or zero of the function. It means the graph of function intersect x-axis at its zeroes.

From the given table it is clear that the value of function are

x | f(x) | Sign

2.0 | 2.8 | Positive

2.5 | 1.1 | Positive

3.0 | –0.8 | Negative

3.5 | –1.2 | Negative

4.0 | –0.3 | Negative

4.5 | 0.7 | Positive

The sign of values of function changes in interval 2.5-3.0 and 4.0-4.5.

It means, the graph of function must intersect x-axis in interval 2.5-3.0 and 4.0-4.5. So, the zeros of the function lie between 2.5 and 3.0 and between 4.0 and 4.5.

Therefore, the correct option is B.

5 0

4 years ago

The graph represents a population of bacteria over a number of days, modeled with an exponential function. Based on the graph, w

Natalka [10]

Answer:

The answer is B

Step-by-step explanation:

I got a 100% on the quiz

5 0

4 years ago

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