All categories

2 years ago

Which of the following describes the parabola with the equation y = −x2 − 3x + 6?

Mathematics

1 answer:

seropon [69]2 years ago

4 0

Answer:

C) The axis of symmetry is x = −1.5 and the vertex is (−1.5, 8.25).

Step-by-step explanation:

The axis of symmetry is x = − b/2a

= -(-3) / 2(-1)

= 3/(-2)

= -1.5

the vertex => x = -1.5

y= -(-1.5)²-3(-1.5)+6 =

-2.25 +4.5+6= 8.25

You might be interested in

A surveyor is attempting to find the distance across a pond. From a point on

SSSSS [86.1K]

Sorry don’t know! Hope u find someone that does know

4 0

2 years ago

7. Two people enter a whispering gallery t want to know where they should stand so they can hear other people whisper. The galle

Nezavi [6.7K]

Answer: Just get closer

Step-by-step explanation:

Walk next to someone to hear them left foot right foot towards them.

6 0

3 years ago

Solve for x 4c-4<8 and 9x+5>23

Alja [10]

Answer: 4c-4<8 = c<3 9x+5>23= x>2

(2,3)

Step-by-step explanation:

4 0

3 years ago

The radius of a cylinder is doubled and its height is halved. Find the ratios of their surface areas.

Inessa [10]

Answer: 1:1

Step-by-step explanation:

Let r be the radius and h be the height of a cylinder.

Formula: Curved surface area of cylinder = $2\pi rh$

Now, if radius of a cylinder is doubled and its height is halved, then new radius will be R= 2r and new height will be $H=\dfrac{1}{2}$

Now, new surface area = $2\pi RH= 2\pi(2r)\dfrac{h}{2}= 2\pi rh$

Ratio of curved surface areas : $\dfrac{\text{Surface area}}{\text{New surface area}}=\dfrac{2\pi rh}{2\pi rh}=\dfrac{1}{1}$

Hence, the ratios of their surface areas = 1:1 .

5 0

2 years ago

Help me please help

Dmitry_Shevchenko [17]

That would be A :D It would be A because you would do keep change flip. You would keep 5/6, change the division sign to multiplication, then flip the 5/16 to 16/5 (the reciprocal)

7 0

3 years ago