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Rufina [12.5K]
3 years ago
6

Graph f(x)=-2x^2-12x-21

Mathematics
1 answer:
ELEN [110]3 years ago
5 0

Step-by-step explanation:

First, find the vertex. The x coordinate is -b/2a, or 12/-4=-3. Plug this back in to get -18+36-21 or -3, so the vertex is (-3, -3). Now, slowly make the x -2, -1, 0, 1, on and on. Because parabolas are symmetric along the vertex, they will have the same values as -4, -5, -6, on and on.

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Select the correct answer from each drop-down menu.
kompoz [17]

Answer: B has greater spread than A.

Step-by-step explanation:

Since we have given that

Set A: {38, 12, 23, 48, 55, 16, 18}

Range of A = Highest - Lowest

Range of A =  55  -  12

Range of A = 43

Set B:{44, 13, 24, 12, 56}

Range of B = Highest - Lowest

Range of B =    56      -     12

Range of B =       44

Since Range of B is more than range of A.

Hence, B has greater spread than A.

6 0
3 years ago
M(d)=-0.123x^2+148.83x-21.07<br> When will it reach maximum height of 45000 feet
Setler [38]

Answer: time to reach maximum height = 605

Step-by-step explanation:

The expression that relates height with time is

M(d)=-0.123x^2+148.83x-21.07

Where time = x

d = height

The expression is a quadratic equation. If height of the object is plotted against time, the resulting graph is a parabola whose vertex is equal to the maximum height attained by the object. The time, x corresponding to the vertex is the time for it to reach maximum height.

To find x,

x = -b/2a

Where a= 0.123

b = 148.83

x = - 148.83 / -2 × -0.123

x = -148.83 / -0.246

= 605

Substituting x = 605 in the equation,

M(d)=-0.123x^2+148.83x-21.07

d = -0.123 × 605^2 + 148.83×605

= - 45021.075+ 90042.15

= 45020.4

Approximately 45000 feet

6 0
3 years ago
Help me please. solve for f (-2)​
Naddika [18.5K]

Answer:

9

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Fruit -o- Rama sells dried pineapple for $0.25 per ounce.Mags spent a total of $2.65 on pineapple. How many ounces did she buy?
Andrews [41]

The answer is 10.6 oz.

2.65 / 0.25 = 10.6

Hope this helps! If so, please mark brainliest!

4 0
3 years ago
Read 2 more answers
HELP ASAP/ WILL MARK BRAINLYIEST If f(x) = 3x + 2, what is f(5)?
krok68 [10]
F(5) is equal to 17.
f(5)= 3(5)+2= 17
4 0
3 years ago
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