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3 years ago

If a projectile is modeled by a parabola, what could the x-intercepts represent?

Mathematics

1 answer:

Mars2501 [29]3 years ago

6 0

Answer: The x-intercepts represents the points at which the parabola crosses the axis of x.

Step-by-step explanation:

If it exist then the x-intercepts represent the zeros, roots, or quadratic function, the values of x at y = 0. Then the parabola does not cross the x-axis, so it has no zeros.

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A bouncy ball is dropped such that the height of its first bounce is 5.5 feet and each successive bounce is 64% of the previous

ahrayia [7]

Answer:

0.4 ft

Step-by-step explanation:

It can be convenient to let a spreadsheet compute the values for you. Here, we have written an explicit formula for the height of the n-th bounce:

h = 5.5×0.64^(n-1)

We have written the formula this way because we are given the height of the first bounce, not the starting height. Each bounce multiplies the height by a factor of 0.64. Then the 7th bounce will have a height of ...

h = 5.5×0.64^6 ≈ 0.378 ≈ 0.4 . . . . feet

6 0

3 years ago

4x-y=20 and -2x-2y=10

lara31 [8.8K]

You can use Substitution to solve this problem:

4x-y=20

-y=-4x+20

y=4x-20

Now you have two equations, and you use the first one to substitute into the second one.

y=4x-20 and -2x-2y=10

-2x-2(4x-20)=10

-2x-8x+40=10

-10x+40=10

-10x=-30

-x=-3

x=3

Now that we have figured out what x is, we can substitute x in to one of the equations to figure out y.

4x-y=20 x=3

4(3)-y=20

12-y=20

-y=8

y=-8

<em><u>So your answer would be x=3 and y=-8</u></em>

6 0

3 years ago

Which expression represents “seventeen more than one-forth y”

Rashid [163]

Answer:

17-1/4y

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Help help help help help

Lady bird [3.3K]

Answer:x=2.4

or 2.4/6

Step-by-step explanation:

4 0

3 years ago

A rectangular patio has an area of (3x – 6) square units. Factor 3x – 6 to find possible dimensions of the patio.

Oduvanchick [21]

Answer:

$w=3,\ l=x-2$

$l=3,\ w=x-2$

Step-by-step explanation:

The area of a rectangle is given by the product of its length and width.

$A=l.w$

If we knew the value of the area, we would not be able to know any of its dimensions without being given other piece of information. We can only make assumptions.

The question states the area of the rectangular patio is 3x-6 units, i.e.

$l.w=3x-6$

We know the product of two quantities results 3x-6, so we can factor that expression to have a possible combination between l and w. Factoring by 3:

$l.w=3(x-2)$

We can say that

$l=3,\ w=x-2$

It can be said also

$w=3,\ l=x-2$

These are not the only possible combinations, but they are as simple as possible

6 0

3 years ago