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rewona [7]
3 years ago
7

Which represents a quadratic function?

Mathematics
2 answers:
blsea [12.9K]3 years ago
8 0
Hello,

a quadratic function has y=ax²+bx+c with a!=0 for equation.
Thus the only answer is f(x)=3/4 x²+2x-5
katen-ka-za [31]3 years ago
5 0
A quadratic equation is of the format:

ax² + bx + c = 0,  where a ≠ 0.

The first option is not quadratic, it is a cubic, it has highest power of 3.

The second option f (x) = 3/4 x ^2 + 2x − 5, is quadratic, that is the answer.

The third f(x) = 4/x^2 - 2/x + 1, doesn't qualify because of the 2/x.

The last f(x) = 0x^2 − 9x + 7 , doesn't qualify because of the a = 0, and the rule is that a ≠ 0.

Therefore  f (x) = 3/4 x ^2 + 2x − 5 represents a quadratic function.

I hope this helps.
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A health club charges non-members $5 per day to swim and $9 per day for an exercise class. Members pay a yearly fee of $300 plus
RSB [31]

Answer:

22 days  PLEASE GIVE BRAINLIEST

Step-by-step explanation:

Nonmember:

swim: $5

exercise: $9

Per day:  9 + 5 = $14


Member:

$300 per year plus $4 per day for an exercise class.  $0 for swimming


300 ÷ 14 = 21.428      21 days x $14 = $294     22 days x $14 = $308

So.... if he goes to the gym at least 22 days he will save money with the membership.

3 0
3 years ago
Read 2 more answers
Identify whether the relations given in the options are functions or not.
stellarik [79]

Answer:

Graphs 1, 2, and 3 are not functions. Graph 4 is a function.

Step-by-step explanation:

Use the vertical line test.

Imagine a vertical line moving from left to right.

If in any position of the vertical line, it intersects more than one point on the graph, then it is not a function.

In graphs 1 and 2 it is clear that there are many vertical lines than would intersect the graph at more than one point.

In graphs 3, a vertical line would intersect the vertical parts of the graph at more than 1 point, so graph 3 is not a function.

The only function is graph 4.

6 0
3 years ago
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!<br><br> Multiply.<br><br> (2 − 5i)(3 + i)
ANEK [815]

(2-5i)(3+i)

use foil method to expand it into standard form

6+2i-15i+5i^2

5i^2-13i+6

7 0
3 years ago
What is the relation between angles x and y?
Sliva [168]
I think it is Adjacent and Supplementary
8 0
3 years ago
Share £40 in the ratio 1:4 between Tim and Sam
lesantik [10]

Answer:

\£8:\£32

Step-by-step explanation:

\frac{40}{1+4}

\frac{40}{5}

=8

1:4

1 \times 8:4 \times 8

8:32

7 0
3 years ago
Read 2 more answers
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