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hjlf
3 years ago
11

Which of the following equations represents a quadratic function?

Mathematics
2 answers:
MAVERICK [17]3 years ago
6 0
The answer is <span>b. y=3x^2-5x+9
</span><span>
The general formula for quadratic function is:
y = ax</span>² + bx + c 

Among all choices only b. is correct:
y = ax² + bx + c 
y = 3x² - 5x + 9 
Marat540 [252]3 years ago
4 0
<span>a. x=y^2-2y+4 & b. y=3x^2-5x+9

or just </span><span>b. y=3x^2-5x+9 (if you can only choose one answer) </span>
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2(3) squared answer and steps.
olga55 [171]

Step-by-step explanation:

2(3)

2×3=6

6×6=36

36 is the correct answer i hope it helps you

4 0
3 years ago
In this diagram, BAC~EDF. If the area of BAC=15 in2, what is the area of EDF? 4, 5.
lesya692 [45]

Answer:

9.6 square inches.

Step-by-step explanation:

We are given that ΔBAC is similar to ΔEDF, and that the area of ΔBAC is 15 inches. And we want to determine the area of ΔDEF.

First, find the scale factor <em>k</em> from ΔBAC to ΔDEF:

\displaystyle 5 k = 4

Solve for the scale factor <em>k: </em>

<em />\displaystyle k = \frac{4}{5}<em />

<em />

Recall that to scale areas, we square the scale factor.

In other words, since the scale factor for sides from ΔBAC to ΔDEF is 4/5, the scale factor for its area will be (4/5)² or 16/25.

Hence, the area of ΔEDF is:

\displaystyle \Delta EDF = \frac{16}{25}\left(15\right) = 9.6\text{ in}^2

In conclusion, the area of ΔEDF is 9.6 square inches.

5 0
3 years ago
Please help
Schach [20]

Answer:

Hence, option: B is correct (11.02 seconds)

Step-by-step explanation:

Spencer hits a tennis ball past his opponent. The height of the tennis ball, in feet, is modeled by the equation h(t) = –0.075t2 + 0.6t + 2.5, where t is the time since the tennis ball was hit, measured in seconds.

Now we are asked:

How long does it take for the ball to reach the ground?

i.e. we have to find the value of t such that height is zero i.e. h(t)=0.

-0.075t2+0.6t+2.5=0

or 0.075t^2-0.6t-2.5=0

i.e. we need to find the roots of the above quadratic equation.

on solving the equation we get two roots as:

t≈ -3.02377 and t≈11.0238

As time can't be negative; hence we will consider the value of t as t≈11.0238.

Hence it takes 11.02 seconds for the ball to reach the ground.

Hence option B is correct (11.02 seconds).

7 0
3 years ago
Read 2 more answers
A racquetball club membership costs $22.50 per month. What would a year’s membership cost?
dsp73

Answer:

270 dollars for a year, so 22.50 times 12

8 0
3 years ago
Read 2 more answers
Cliff Branch bought a home with a 10.5% adjustable rate mortgage for 30 years. He paid $9.99 monthly per thousand on his origina
vichka [17]
I'm Unsure, But Here's What I Found.

9.99×65=649.35

10.68×65=694.2

((10.68÷9.99)−1)×100=6.9%
4 0
3 years ago
Read 2 more answers
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