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3 years ago

Choose all functions below that have a vertex of (4.5,-8)

Mathematics

1 answer:

viktelen [127]3 years ago

7 0

Answer: Answer: A

Explanation:

Just plug in numbers since you know the unknown values,

x + r = 4 + 5

4 + 5 = 9

Step-by-step explanation:

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A person takes a trip, driving with a constant peed of 89.5 km/h, except for a 22.0-min rest stop. If the peron's average speed

Stolb23 [73]

Answer:

a) The person traveled 2.83 hours.

b) The person travels 220.17 kilometers.

Step-by-step explanation:

We have that the speed is the distance divided by the time. Mathematically, that is

$s = \frac{d}{t}$

(a) how much time is spent on the trip and

The peron's average speed is 77.8 km/h, which means that $s = 77.8$

The person distance traveled is:

22 min is 22/60 = 0.37h.

So for the time t1, the person traveled at a speed of 89.5 km/h. Which has a distance of 89.5*t1.

For 0.37h, the person was at a stop, so she did not travel. This means that the total distance is

$d = 89.5t1 + 0 = 89.5t1$

The total time is the time traveling t and the stoppage time 0.37. So

$t = t1 + 0.37$

We want to find t1, which is the time that the person was driving.

$s = \frac{d}{t}$

$77.8 = \frac{89.5t1}{t1 + 0.37}$

$77.8t1 + 77.8*0.37 = 89.5t1$

$11.7t1 = 28.786$

$t1 = \frac{28.786}{11.7}$

$t1 = 2.46$

The total time is

$t = t1 + 0.37 = 2.46 + 0.37 = 2.83$

The person traveled for 2.83 hours.

(b) how far does the person travel?

The person traveled 2.46 hours at an average speed of 77.8 km/h. So

$s = \frac{d}{t}$

$77.8 = \frac{d}{2.83}$

$d = 77.8*2.83 = 220.17$

The person travels 220.17 kilometers.

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3 years ago

A study of injuries to in-line skaters used data from the National Electronic Injury Surveillance System, which collects data fr

Katarina [22]

Answer:

(a) One count is only 7, and the guidelines for using the large-sample method call for all counts to be at least 10.

Step-by-step explanation:

Attached is the solution to b and c

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3 years ago

Find the perimeter of a triangle with sides measuring 10 inches, 14 inches and 15 inches.

Flura [38]

Perimeter means finding the total area of the outside of the triange (so the sum of all sides).

If you need further help, let me know!

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3 years ago

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Divide.<br>(10a^4-5a^3) / 5a

wolverine [178]

$\boxed{\frac{10a^4-5a^3}{ 5a}=\frac{10a^4}{5a}-\frac{5a^3}{5a}=2a^3-a^2}$

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3 years ago

A Arrange the following integers in ascending order<br>1) 37, 41, 76, -2.25 -25<br>Answer:

madreJ [45]

ASCENDING ORDER

76,41,36,25,-2,-25

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3 years ago

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Choose all functions below that have a vertex of (4.5,-8)​

Choose all functions below that have a vertex of (4.5,-8)